Merge pull request #198 from secondlife/DRTVWR-559-merge-539

DRTVWR-559 merge 539

83 files changed, 6001 insertions, 883 deletions

diff --git a/doc/contributions.txt b/doc/contributions.txt
index 6e08cba599..2f8641cab8 100755
--- a/doc/contributions.txt
+++ b/doc/contributions.txt
@@ -283,8 +283,11 @@ Beq Janus
 	SL-11300
 	SL-15709
 	SL-16021
+	SL-18202
+	SL-18586
 	SL-18592
 	SL-18637
+	SL-19317
 Beth Walcher
 Bezilon Kasei
 Biancaluce Robbiani
diff --git a/indra/cmake/Copy3rdPartyLibs.cmake b/indra/cmake/Copy3rdPartyLibs.cmake
index 1ee2a621f2..d43cc30706 100644
--- a/indra/cmake/Copy3rdPartyLibs.cmake
+++ b/indra/cmake/Copy3rdPartyLibs.cmake
@@ -220,6 +220,7 @@ elseif(LINUX)
                  libfreetype.so.6.6.2
                  libfreetype.so.6
                  libhunspell-1.3.so.0.0.0
+                 libopenjp2.so
                  libuuid.so.16
                  libuuid.so.16.0.22
                  libfontconfig.so.1.8.0
@@ -295,6 +296,6 @@ if(DARWIN)
     # that end up in any of the above SHARED_LIB_STAGING_DIR_MUMBLE
     # directories.
     add_custom_command( TARGET stage_third_party_libs POST_BUILD
-            COMMAND cmake -E create_symlink ${SHARED_LIB_STAGING_DIR} ${CMAKE_BINARY_DIR}/sharedlibs/Resources
+            COMMAND ${CMAKE_COMMAND} -E create_symlink ${SHARED_LIB_STAGING_DIR} ${CMAKE_BINARY_DIR}/sharedlibs/Resources
             )
 endif()
diff --git a/indra/edit-me-to-trigger-new-build.txt b/indra/edit-me-to-trigger-new-build.txt
index eab7c17b71..8b13789179 100644
--- a/indra/edit-me-to-trigger-new-build.txt
+++ b/indra/edit-me-to-trigger-new-build.txt
@@ -1,4 +1 @@
-euclid 5/29/2020
-euclid 7/23/2020
-euclid 4/29/2021
-euclid 10/5/2021 DRTVWR-546
+
diff --git a/indra/integration_tests/llui_libtest/CMakeLists.txt b/indra/integration_tests/llui_libtest/CMakeLists.txt
index d603e57aab..a6ce657f4f 100644
--- a/indra/integration_tests/llui_libtest/CMakeLists.txt
+++ b/indra/integration_tests/llui_libtest/CMakeLists.txt
@@ -58,19 +58,12 @@ if (WINDOWS)
     # Copy over OpenJPEG.dll
     # *NOTE: On Windows with VS2005, only the first comment prints
     set(OPENJPEG_RELEASE
-        "${ARCH_PREBUILT_DIRS_RELEASE}/openjp2.dll")
+            "${ARCH_PREBUILT_DIRS_RELEASE}/openjpeg.dll")
     add_custom_command( TARGET llui_libtest POST_BUILD
             COMMAND ${CMAKE_COMMAND} -E copy_if_different
             ${OPENJPEG_RELEASE} ${CMAKE_CURRENT_BINARY_DIR}
-        COMMENT "Copying OpenJPEG DLLs to binary directory"
-        )
-    set(OPENJPEG_DEBUG
-        "${ARCH_PREBUILT_DIRS_DEBUG}/openjp2.dll")
-    add_custom_command( TARGET llui_libtest POST_BUILD
-        COMMAND ${CMAKE_COMMAND} -E copy_if_different 
-            ${OPENJPEG_DEBUG} ${CMAKE_CURRENT_BINARY_DIR}
-        )
-  
+            COMMENT "Copying OpenJPEG DLLs to binary directory"
+            )
 endif (WINDOWS)
 
 # Ensure people working on the viewer don't break this library
diff --git a/indra/llcommon/tests/llprocess_test.cpp b/indra/llcommon/tests/llprocess_test.cpp
index 999d432079..81449b4a42 100644
--- a/indra/llcommon/tests/llprocess_test.cpp
+++ b/indra/llcommon/tests/llprocess_test.cpp
@@ -356,7 +356,7 @@ namespace tut
 
         // Create a script file in a temporary place.
         NamedTempFile script("py",
-			"from __future__ import print_function" EOL
+            "from __future__ import print_function" EOL
             "import sys" EOL
             "import time" EOL
             EOL
@@ -366,7 +366,7 @@ namespace tut
             "time.sleep(2)" EOL
             "print('stderr after wait',file=sys.stderr)" EOL
             "sys.stderr.flush()" EOL
-            );
+        );
 
         // Arrange to track the history of our interaction with child: what we
         // fetched, which pipe it came from, how many tries it took before we
@@ -862,8 +862,8 @@ namespace tut
         set_test_name("'bogus' test");
         CaptureLog recorder;
         PythonProcessLauncher py(get_test_name(),
-                                 "from __future__ import print_function\n"
-                                 "print('Hello world')\n");
+            "from __future__ import print_function\n"
+            "print('Hello world')\n");
         py.mParams.files.add(LLProcess::FileParam("bogus"));
         py.mPy = LLProcess::create(py.mParams);
         ensure("should have rejected 'bogus'", ! py.mPy);
@@ -878,8 +878,8 @@ namespace tut
         // Replace this test with one or more real 'file' tests when we
         // implement 'file' support
         PythonProcessLauncher py(get_test_name(),
-                                 "from __future__ import print_function\n"
-                                 "print('Hello world')\n");
+            "from __future__ import print_function\n"
+            "print('Hello world')\n");
         py.mParams.files.add(LLProcess::FileParam());
         py.mParams.files.add(LLProcess::FileParam("file"));
         py.mPy = LLProcess::create(py.mParams);
@@ -894,8 +894,8 @@ namespace tut
         // implement 'tpipe' support
         CaptureLog recorder;
         PythonProcessLauncher py(get_test_name(),
-                                 "from __future__ import print_function\n"
-                                 "print('Hello world')\n");
+            "from __future__ import print_function\n"
+            "print('Hello world')\n");
         py.mParams.files.add(LLProcess::FileParam());
         py.mParams.files.add(LLProcess::FileParam("tpipe"));
         py.mPy = LLProcess::create(py.mParams);
@@ -912,8 +912,8 @@ namespace tut
         // implement 'npipe' support
         CaptureLog recorder;
         PythonProcessLauncher py(get_test_name(),
-                                 "from __future__ import print_function\n"
-                                 "print('Hello world')\n");
+            "from __future__ import print_function\n"
+            "print('Hello world')\n");
         py.mParams.files.add(LLProcess::FileParam());
         py.mParams.files.add(LLProcess::FileParam());
         py.mParams.files.add(LLProcess::FileParam("npipe"));
@@ -989,20 +989,20 @@ namespace tut
     {
         set_test_name("get*Pipe() validation");
         PythonProcessLauncher py(get_test_name(),
-                                 "from __future__ import print_function\n"
-                                 "print('this output is expected')\n");
+            "from __future__ import print_function\n"
+            "print('this output is expected')\n");
         py.mParams.files.add(LLProcess::FileParam("pipe")); // pipe for  stdin
         py.mParams.files.add(LLProcess::FileParam());       // inherit stdout
         py.mParams.files.add(LLProcess::FileParam("pipe")); // pipe for stderr
         py.run();
         TEST_getPipe(*py.mPy, getWritePipe, getOptWritePipe,
-                     LLProcess::STDIN,   // VALID
-                     LLProcess::STDOUT,  // NOPIPE
-                     LLProcess::STDERR); // BADPIPE
+            LLProcess::STDIN,   // VALID
+            LLProcess::STDOUT,  // NOPIPE
+            LLProcess::STDERR); // BADPIPE
         TEST_getPipe(*py.mPy, getReadPipe,  getOptReadPipe,
-                     LLProcess::STDERR,  // VALID
-                     LLProcess::STDOUT,  // NOPIPE
-                     LLProcess::STDIN);  // BADPIPE
+            LLProcess::STDERR,  // VALID
+            LLProcess::STDOUT,  // NOPIPE
+            LLProcess::STDIN);  // BADPIPE
     }
 
     template<> template<>
@@ -1129,8 +1129,8 @@ namespace tut
     {
         set_test_name("ReadPipe \"eof\" event");
         PythonProcessLauncher py(get_test_name(),
-                                 "from __future__ import print_function\n"
-                                 "print('Hello from Python!')\n");
+            "from __future__ import print_function\n"
+            "print('Hello from Python!')\n");
         py.mParams.files.add(LLProcess::FileParam()); // stdin
         py.mParams.files.add(LLProcess::FileParam("pipe")); // stdout
         py.launch();
diff --git a/indra/llui/llscrolllistcell.cpp b/indra/llui/llscrolllistcell.cpp
index 8dd552d2ad..f73c9aa539 100644
--- a/indra/llui/llscrolllistcell.cpp
+++ b/indra/llui/llscrolllistcell.cpp
@@ -54,6 +54,10 @@ LLScrollListCell* LLScrollListCell::create(const LLScrollListCell::Params& cell_
 	{
 		cell = new LLScrollListIconText(cell_p);
 	}
+    else if (cell_p.type() == "bar")
+    {
+        cell = new LLScrollListBar(cell_p);
+    }
 	else	// default is "text"
 	{
 		cell = new LLScrollListText(cell_p);
@@ -174,6 +178,74 @@ void LLScrollListIcon::draw(const LLColor4& color, const LLColor4& highlight_col
 }
 
 //
+// LLScrollListBar
+//
+LLScrollListBar::LLScrollListBar(const LLScrollListCell::Params& p)
+    :	LLScrollListCell(p),
+    mRatio(0),
+    mColor(p.color),
+    mBottom(1),
+    mLeftPad(1),
+    mRightPad(1)
+{}
+
+LLScrollListBar::~LLScrollListBar()
+{
+}
+
+/*virtual*/
+S32 LLScrollListBar::getHeight() const
+{ 
+    return LLScrollListCell::getHeight();
+}
+
+/*virtual*/
+const LLSD LLScrollListBar::getValue() const
+{ 
+    return LLStringUtil::null; 
+}
+
+void LLScrollListBar::setValue(const LLSD& value)
+{
+    if (value.has("ratio"))
+    {
+        mRatio = value["ratio"].asReal();
+    }
+    if (value.has("bottom"))
+    {
+        mBottom = value["bottom"].asInteger();
+    }
+    if (value.has("left_pad"))
+    {
+        mLeftPad = value["left_pad"].asInteger();
+    }
+    if (value.has("right_pad"))
+    {
+        mRightPad = value["right_pad"].asInteger();
+    }
+}
+
+void LLScrollListBar::setColor(const LLColor4& color)
+{
+    mColor = color;
+}
+
+S32	LLScrollListBar::getWidth() const 
+{
+    return LLScrollListCell::getWidth();
+}
+
+
+void LLScrollListBar::draw(const LLColor4& color, const LLColor4& highlight_color)	 const
+{
+    S32 bar_width = getWidth() - mLeftPad - mRightPad;
+    S32 left = bar_width - bar_width * mRatio;
+    left = llclamp(left, mLeftPad, getWidth() - mRightPad - 1);
+
+    gl_rect_2d(left, mBottom, getWidth() - mRightPad, mBottom - 1, mColor);
+}
+
+//
 // LLScrollListText
 //
 U32 LLScrollListText::sCount = 0;
diff --git a/indra/llui/llscrolllistcell.h b/indra/llui/llscrolllistcell.h
index ede8d847d9..2588da2331 100644
--- a/indra/llui/llscrolllistcell.h
+++ b/indra/llui/llscrolllistcell.h
@@ -33,6 +33,7 @@
 #include "lluistring.h"
 #include "v4color.h"
 #include "llui.h"
+#include "llgltexture.h"
 
 class LLCheckBoxCtrl;
 class LLSD;
@@ -159,6 +160,7 @@ public:
 
 	void			setText(const LLStringExplicit& text);
 	void			setFontStyle(const U8 font_style);
+    void			setAlignment(LLFontGL::HAlign align) { mFontAlignment = align; }
 
 protected:
 	LLUIString		mText;
@@ -199,6 +201,26 @@ private:
 	LLFontGL::HAlign		mAlignment;
 };
 
+
+class LLScrollListBar : public LLScrollListCell
+{
+public:
+    LLScrollListBar(const LLScrollListCell::Params& p);
+    /*virtual*/ ~LLScrollListBar();
+    /*virtual*/ void	draw(const LLColor4& color, const LLColor4& highlight_color) const;
+    /*virtual*/ S32		getWidth() const;
+    /*virtual*/ S32		getHeight() const;
+    /*virtual*/ const LLSD		getValue() const;
+    /*virtual*/ void	setColor(const LLColor4&);
+    /*virtual*/ void	setValue(const LLSD& value);
+
+private:
+    LLColor4                    mColor;
+    F32                         mRatio;
+    S32                         mBottom;
+    S32                         mRightPad;
+    S32                         mLeftPad;
+};
 /*
  * An interactive cell containing a check box.
  */
diff --git a/indra/llwindow/llwindow.cpp b/indra/llwindow/llwindow.cpp
index 66be3efffc..9e281dfc99 100644
--- a/indra/llwindow/llwindow.cpp
+++ b/indra/llwindow/llwindow.cpp
@@ -117,7 +117,8 @@ LLWindow::LLWindow(LLWindowCallbacks* callbacks, BOOL fullscreen, U32 flags)
 	  mSwapMethod(SWAP_METHOD_UNDEFINED),
 	  mHideCursorPermanent(FALSE),
 	  mFlags(flags),
-	  mHighSurrogate(0)
+	  mHighSurrogate(0),
+	  mRefreshRate(0)
 {
 }
 
diff --git a/indra/llwindow/llwindow.h b/indra/llwindow/llwindow.h
index 862897a48c..b1408d894f 100644
--- a/indra/llwindow/llwindow.h
+++ b/indra/llwindow/llwindow.h
@@ -199,6 +199,8 @@ public:
     // windows only DirectInput8 for joysticks
     virtual void* getDirectInput8() { return NULL; };
     virtual bool getInputDevices(U32 device_type_filter, void * devices_callback, void* userdata) { return false; };
+
+    virtual S32 getRefreshRate() { return mRefreshRate; }
 protected:
 	LLWindow(LLWindowCallbacks* callbacks, BOOL fullscreen, U32 flags);
 	virtual ~LLWindow();
@@ -232,6 +234,7 @@ protected:
 	U16			mHighSurrogate;
 	S32			mMinWindowWidth;
 	S32			mMinWindowHeight;
+    S32         mRefreshRate;
 
  	// Handle a UTF-16 encoding unit received from keyboard.
  	// Converting the series of UTF-16 encoding units to UTF-32 data,
diff --git a/indra/llwindow/llwindowmacosx.cpp b/indra/llwindow/llwindowmacosx.cpp
index aae6539685..8bfaeca614 100644
--- a/indra/llwindow/llwindowmacosx.cpp
+++ b/indra/llwindow/llwindowmacosx.cpp
@@ -49,6 +49,8 @@ BOOL gHiDPISupport = TRUE;
 const S32	BITS_PER_PIXEL = 32;
 const S32	MAX_NUM_RESOLUTIONS = 32;
 
+const S32   DEFAULT_REFRESH_RATE = 60;
+
 namespace
 {
     NSKeyEventRef mRawKeyEvent = NULL;
@@ -654,6 +656,13 @@ BOOL LLWindowMacOSX::createContext(int x, int y, int width, int height, int bits
 		}
 	}
 
+    mRefreshRate = CGDisplayModeGetRefreshRate(CGDisplayCopyDisplayMode(mDisplay));
+    if(mRefreshRate == 0)
+    {
+        //consider adding more appropriate fallback later
+        mRefreshRate = DEFAULT_REFRESH_RATE;
+    }
+
 	// Disable vertical sync for swap
     toggleVSync(enable_vsync);
 
diff --git a/indra/llwindow/llwindowwin32.cpp b/indra/llwindow/llwindowwin32.cpp
index 2bdfaf57de..651c04f32c 100644
--- a/indra/llwindow/llwindowwin32.cpp
+++ b/indra/llwindow/llwindowwin32.cpp
@@ -691,7 +691,7 @@ LLWindowWin32::LLWindowWin32(LLWindowCallbacks* callbacks,
 	{
 		current_refresh = 60;
 	}
-
+    mRefreshRate = current_refresh;
 	//-----------------------------------------------------------------------
 	// Drop resolution and go fullscreen
 	// use a display mode with our desired size and depth, with a refresh
@@ -1172,6 +1172,7 @@ BOOL LLWindowWin32::switchContext(BOOL fullscreen, const LLCoordScreen& size, BO
     {
         current_refresh = 60;
     }
+    mRefreshRate = current_refresh;
 
     gGLManager.shutdownGL();
     //destroy gl context
diff --git a/indra/newview/CMakeLists.txt b/indra/newview/CMakeLists.txt
index 3bc636bac4..c6d82ea260 100644
--- a/indra/newview/CMakeLists.txt
+++ b/indra/newview/CMakeLists.txt
@@ -257,10 +257,12 @@ set(viewer_SOURCE_FILES
     llfloaterpathfindinglinksets.cpp
     llfloaterpathfindingobjects.cpp
     llfloaterpay.cpp
+    llfloaterperformance.cpp
     llfloaterperms.cpp
     llfloaterpostprocess.cpp
     llfloaterprofile.cpp
     llfloaterpreference.cpp
+    llfloaterpreferencesgraphicsadvanced.cpp
     llfloaterpreferenceviewadvanced.cpp
     llfloaterpreviewtrash.cpp
     llfloaterprofiletexture.cpp
@@ -904,10 +906,12 @@ set(viewer_HEADER_FILES
     llfloaterpathfindinglinksets.h
     llfloaterpathfindingobjects.h
     llfloaterpay.h
+    llfloaterperformance.h
     llfloaterperms.h
     llfloaterpostprocess.h
     llfloaterprofile.h
     llfloaterpreference.h
+    llfloaterpreferencesgraphicsadvanced.h
     llfloaterpreferenceviewadvanced.h
     llfloaterpreviewtrash.h
     llfloaterprofiletexture.h
@@ -1350,6 +1354,9 @@ set(viewer_HEADER_FILES
     VorbisFramework.h
     )
 
+  list(APPEND viewer_SOURCE_FILES llperfstats.cpp)
+  list(APPEND viewer_HEADER_FILES llperfstats.h)
+
 source_group("CMake Rules" FILES ViewerInstall.cmake)
 
 #build_data.json creation moved to viewer_manifest.py MAINT-6413
diff --git a/indra/newview/app_settings/commands.xml b/indra/newview/app_settings/commands.xml
index 2644f5f449..4a3dfffde1 100644
--- a/indra/newview/app_settings/commands.xml
+++ b/indra/newview/app_settings/commands.xml
@@ -285,4 +285,14 @@
          is_running_function="Floater.IsOpen"
          is_running_parameters="360capture"
            />
+  <command name="performance"
+         available_in_toybox="true"
+         icon="Command_Performance_Icon"
+         label_ref="Command_Performance_Label"
+         tooltip_ref="Command_Performance_Tooltip"
+         execute_function="Floater.ToggleOrBringToFront"
+         execute_parameters="performance"
+         is_running_function="Floater.IsOpen"
+         is_running_parameters="performance"
+           />
 </commands>
diff --git a/indra/newview/app_settings/settings.xml b/indra/newview/app_settings/settings.xml
index 2f1a2ef120..97f07e5952 100644
--- a/indra/newview/app_settings/settings.xml
+++ b/indra/newview/app_settings/settings.xml
@@ -1426,7 +1426,7 @@
       <key>Type</key>
       <string>U32</string>
       <key>Value</key>
-      <integer>1024</integer>
+      <integer>4096</integer>
     </map>
     <key>CacheValidateCounter</key>
     <map>
@@ -8828,6 +8828,17 @@
       <key>Value</key>
       <integer>0</integer>
     </map>
+  <key>RenderClass1MemoryBandwidth</key>
+  <map>
+    <key>Comment</key>
+    <string>Memory bandwidth at which to default to Class 1 in gigabytes per second.  Used as basis for higher classes.</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>F32</string>
+    <key>Value</key>
+    <real>32.0</real>
+  </map>
   <key>RenderCloudShadowAmbianceFactor</key>
   <map>
     <key>Comment</key>
@@ -8839,6 +8850,17 @@
     <key>Value</key>
     <real>0.1</real>
   </map>
+  <key>RenderCPUBasis</key>
+  <map>
+    <key>Comment</key>
+    <string>Reference CPU clockspeed to use to bias GPU class (in MHz).</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>F32</string>
+    <key>Value</key>
+    <real>3000.0</real>
+  </map>
   <key>RenderComplexityColorMin</key>
     <map>
       <key>Comment</key>
@@ -9061,6 +9083,17 @@
     <key>Value</key>
     <real>0.5</real>
   </map>
+  <key>RenderShadowSplits</key>
+  <map>
+    <key>Comment</key>
+    <string>Amount of shadow map splits to render (0 - 3).</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>S32</string>
+    <key>Value</key>
+    <integer>3</integer>
+  </map>
   <key>RenderSSAOScale</key>
   <map>
     <key>Comment</key>
@@ -16843,6 +16876,149 @@
       <key>Value</key>
       <integer>0</integer>
     </map>
+  <key>TargetFPS</key>
+  <map>
+    <key>Comment</key>
+    <string>Desired minimum FPS</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>U32</string>
+    <key>Value</key>
+    <integer>15</integer>
+  </map>
+  <key>AutoTuneFPS</key>
+  <map>
+    <key>Comment</key>
+    <string>Allow the viewer to adjust your settings to achieve target FPS</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>Boolean</string>
+    <key>Value</key>
+    <integer>0</integer>
+  </map>
+  <key>AutoTuneLock</key>
+  <map>
+    <key>Comment</key>
+    <string>When enabled the viewer will dynamically change settings until auto tune is explicitly turned off.</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>Boolean</string>
+    <key>Value</key>
+    <integer>0</integer>
+  </map>
+  <key>KeepAutoTuneLock</key>
+  <map>
+    <key>Comment</key>
+    <string>When enabled the AutoTuneLock will be maintainted all following sessions.</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>U32</string>
+    <key>Value</key>
+    <integer>1</integer>
+  </map>
+  <key>AllowSelfImpostor</key>
+  <map>
+    <key>Comment</key>
+    <string>Allow own render time to impostor your avatar.</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>Boolean</string>
+    <key>Value</key>
+    <integer>0</integer>
+  </map>
+  <key>ShowTunedART</key>
+  <map>
+    <key>Comment</key>
+    <string>Show the current render time not the pre-tuning render time in the avatar display.</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>Boolean</string>
+    <key>Value</key>
+    <integer>1</integer>
+  </map>
+  <key>RenderAvatarMaxART</key>
+  <map>
+    <key>Comment</key>
+    <string>Render Time Limit in microseconds (0.0 = no limit)</string>
+    <key>Persist</key>
+    <integer>0</integer>
+    <key>Type</key>
+    <string>F32</string>
+    <key>Value</key>
+    <real>4.699</real>
+  </map>
+  <key>AutoTuneRenderFarClipMin</key>
+  <map>
+    <key>Comment</key>
+    <string>The lowest draw distance that auto tune is allowed to use</string>
+    <key>Persist</key>
+    <integer>0</integer>
+    <key>Type</key>
+    <string>F32</string>
+    <key>Value</key>
+    <real>32.0</real>
+  </map>
+  <key>AutoTuneRenderFarClipTarget</key>
+  <map>
+    <key>Comment</key>
+    <string>The draw distance that auto tune will try to achieve</string>
+    <key>Persist</key>
+    <integer>0</integer>
+    <key>Type</key>
+    <string>F32</string>
+    <key>Value</key>
+    <real>256.0</real>
+  </map>
+  <key>PerfStatsCaptureEnabled</key>
+  <map>
+    <key>Comment</key>
+    <string>Enable/disable render time data to support autotune.</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>Boolean</string>
+    <key>Value</key>
+    <integer>1</integer>
+  </map>
+  <key>AutoTuneImpostorByDistEnabled</key>
+  <map>
+    <key>Comment</key>
+    <string>Enable/disable using MaxNonImpostor to limit avatar rendering by distance.</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>Boolean</string>
+    <key>Value</key>
+    <integer>0</integer>
+  </map>
+  <key>AutoTuneImpostorFarAwayDistance</key>
+  <map>
+    <key>Comment</key>
+    <string>Avatars beyond this range will automatically be optimized</string>
+    <key>Persist</key>
+    <integer>0</integer>
+    <key>Type</key>
+    <string>F32</string>
+    <key>Value</key>
+    <real>64.0</real>
+  </map>
+  <key>TuningFPSStrategy</key>
+  <map>
+    <key>Comment</key>
+    <string>Strategy to use when tuning FPS. 0=Tune avatar rendering only, 1=Tune both avatar and global scene settings, 2=Tune only global scene.</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>U32</string>
+    <key>Value</key>
+    <integer>1</integer>
+  </map>
   <key>CameraOpacity</key>
   <map>
     <key>Comment</key>
diff --git a/indra/newview/app_settings/toolbars.xml b/indra/newview/app_settings/toolbars.xml
index f3a23edc58..a1c9d6d9ee 100644
--- a/indra/newview/app_settings/toolbars.xml
+++ b/indra/newview/app_settings/toolbars.xml
@@ -22,6 +22,7 @@
     <command name="voice"/>
     <command name="minimap"/>
     <command name="snapshot"/>
+    <command name="performance"/>
   </left_toolbar>
   <right_toolbar
     button_display_mode="icons_only">
diff --git a/indra/newview/featuretable.txt b/indra/newview/featuretable.txt
index 78c2578cec..79d92adcc2 100644
--- a/indra/newview/featuretable.txt
+++ b/indra/newview/featuretable.txt
@@ -113,9 +113,9 @@ RenderReflectionProbeLevel  1   0
 list LowMid
 RenderAnisotropic			1	0
 RenderAvatarLODFactor		1	0.5
-RenderAvatarMaxNonImpostors 1   5
 RenderAvatarMaxComplexity   1	100000
 RenderAvatarPhysicsLODFactor 1	0.75
+RenderAvatarMaxNonImpostors 1   5
 RenderFarClip				1	96
 RenderFlexTimeFactor		1	1.0
 RenderGlowResolutionPow		1	8
@@ -143,9 +143,9 @@ RenderReflectionProbeLevel  1   1
 list Mid
 RenderAnisotropic			1	1
 RenderAvatarLODFactor		1	1.0
-RenderAvatarMaxNonImpostors 1   7
 RenderAvatarMaxComplexity   1	200000
 RenderAvatarPhysicsLODFactor 1	1.0
+RenderAvatarMaxNonImpostors 1   7
 RenderFarClip				1	128
 RenderFlexTimeFactor		1	1.0
 RenderGlowResolutionPow		1	9
@@ -173,9 +173,9 @@ RenderReflectionProbeLevel  1   2
 list MidHigh
 RenderAnisotropic			1	1
 RenderAvatarLODFactor		1	1.0
-RenderAvatarMaxNonImpostors 1   9
 RenderAvatarMaxComplexity   1	250000
 RenderAvatarPhysicsLODFactor 1	1.0
+RenderAvatarMaxNonImpostors 1   9
 RenderFarClip				1	128
 RenderFlexTimeFactor		1	1.0
 RenderGlowResolutionPow		1	9
@@ -203,9 +203,9 @@ RenderReflectionProbeLevel  1   2
 list High
 RenderAnisotropic			1	1
 RenderAvatarLODFactor		1	1.0
-RenderAvatarMaxNonImpostors 1   11
 RenderAvatarMaxComplexity   1	300000
 RenderAvatarPhysicsLODFactor 1	1.0
+RenderAvatarMaxNonImpostors 1   11
 RenderFarClip				1	128
 RenderFlexTimeFactor		1	1.0
 RenderGlowResolutionPow		1	9
@@ -233,9 +233,9 @@ RenderReflectionProbeLevel  1   3
 list HighUltra
 RenderAnisotropic			1	1
 RenderAvatarLODFactor		1	1.0
-RenderAvatarMaxNonImpostors 1   16
 RenderAvatarMaxComplexity   1	350000
 RenderAvatarPhysicsLODFactor 1	1.0
+RenderAvatarMaxNonImpostors 1   16
 RenderFarClip				1	128
 RenderFlexTimeFactor		1	1.0
 RenderGlowResolutionPow		1	9
diff --git a/indra/newview/featuretable_linux.txt b/indra/newview/featuretable_linux.txt
index 66197e6484..4bcefc1546 100644
--- a/indra/newview/featuretable_linux.txt
+++ b/indra/newview/featuretable_linux.txt
@@ -59,7 +59,6 @@ WindLightUseAtmosShaders	1	1
 WLSkyDetail					1	128
 Disregard128DefaultDrawDistance	1	1
 Disregard96DefaultDrawDistance	1	1
-RenderTextureMemoryMultiple		1	1.0
 RenderCompressTextures		1	1
 RenderShaderLightingMaxLevel	1	3
 RenderDeferred				1	1
diff --git a/indra/newview/featuretable_mac.txt b/indra/newview/featuretable_mac.txt
index 1d407b52d8..72deabd9f1 100644
--- a/indra/newview/featuretable_mac.txt
+++ b/indra/newview/featuretable_mac.txt
@@ -93,7 +93,7 @@ RenderTerrainDetail			1	0
 RenderTerrainLODFactor		1	1
 RenderTransparentWater		1	0
 RenderTreeLODFactor			1	0
-RenderVolumeLODFactor		1	0.5
+RenderVolumeLODFactor		1	1.125
 RenderDeferredSSAO			1	0
 RenderUseAdvancedAtmospherics 1 0
 RenderShadowDetail			1	0
@@ -111,9 +111,9 @@ RenderReflectionProbeLevel  1   0
 list LowMid
 RenderAnisotropic			1	0
 RenderAvatarLODFactor		1	0.5
-RenderAvatarMaxNonImpostors 1   5
 RenderAvatarMaxComplexity   1	100000
 RenderAvatarPhysicsLODFactor 1	0.75
+RenderAvatarMaxNonImpostors 1   5
 RenderFarClip				1	96
 RenderFlexTimeFactor		1	1.0
 RenderGlowResolutionPow		1	8
@@ -141,9 +141,9 @@ RenderReflectionProbeLevel  1   1
 list Mid
 RenderAnisotropic			1	1
 RenderAvatarLODFactor		1	1.0
-RenderAvatarMaxNonImpostors 1   7
 RenderAvatarMaxComplexity   1	200000
 RenderAvatarPhysicsLODFactor 1	1.0
+RenderAvatarMaxNonImpostors 1   7
 RenderFarClip				1	128
 RenderFlexTimeFactor		1	1.0
 RenderGlowResolutionPow		1	9
@@ -171,9 +171,9 @@ RenderReflectionProbeLevel  1   2
 list MidHigh
 RenderAnisotropic			1	1
 RenderAvatarLODFactor		1	1.0
-RenderAvatarMaxNonImpostors 1   9
 RenderAvatarMaxComplexity   1	250000
 RenderAvatarPhysicsLODFactor 1	1.0
+RenderAvatarMaxNonImpostors 1   9
 RenderFarClip				1	128
 RenderFlexTimeFactor		1	1.0
 RenderGlowResolutionPow		1	9
@@ -201,9 +201,9 @@ RenderReflectionProbeLevel  1   2
 list High
 RenderAnisotropic			1	1
 RenderAvatarLODFactor		1	1.0
-RenderAvatarMaxNonImpostors 1   11
 RenderAvatarMaxComplexity   1	300000
 RenderAvatarPhysicsLODFactor 1	1.0
+RenderAvatarMaxNonImpostors 1   11
 RenderFarClip				1	128
 RenderFlexTimeFactor		1	1.0
 RenderGlowResolutionPow		1	9
@@ -261,8 +261,8 @@ RenderReflectionProbeLevel  1   3
 list Ultra
 RenderAnisotropic			1	1
 RenderAvatarLODFactor		1	1.0
-RenderAvatarMaxNonImpostors 1   16
 RenderAvatarPhysicsLODFactor 1	1.0
+RenderAvatarMaxNonImpostors 1   16
 RenderFarClip				1	256
 RenderFlexTimeFactor		1	1.0
 RenderGlowResolutionPow		1	9
diff --git a/indra/newview/llagent.cpp b/indra/newview/llagent.cpp
index a68dba98bb..4c3891f302 100644
--- a/indra/newview/llagent.cpp
+++ b/indra/newview/llagent.cpp
@@ -63,6 +63,7 @@
 #include "llnotificationsutil.h"
 #include "llpaneltopinfobar.h"
 #include "llparcel.h"
+#include "llperfstats.h"
 #include "llrendersphere.h"
 #include "llscriptruntimeperms.h"
 #include "llsdutil.h"
@@ -4094,6 +4095,7 @@ void LLAgent::handleTeleportFinished()
             mRegionp->setCapabilitiesReceivedCallback(boost::bind(&LLAgent::onCapabilitiesReceivedAfterTeleport));
         }
     }
+    LLPerfStats::tunables.autoTuneTimeout = true;
 }
 
 void LLAgent::handleTeleportFailed()
@@ -4125,6 +4127,8 @@ void LLAgent::handleTeleportFailed()
 	}
 
     mTPNeedsNeabyChatSeparator = false;
+
+    LLPerfStats::tunables.autoTuneTimeout = true;
 }
 
 /*static*/
diff --git a/indra/newview/llappviewer.cpp b/indra/newview/llappviewer.cpp
index b17c78abac..b2349e9f74 100644
--- a/indra/newview/llappviewer.cpp
+++ b/indra/newview/llappviewer.cpp
@@ -107,6 +107,7 @@
 #include "llscenemonitor.h"
 #include "llavatarrenderinfoaccountant.h"
 #include "lllocalbitmaps.h"
+#include "llperfstats.h" 
 #include "llgltfmateriallist.h"
 
 // Linden library includes
@@ -1358,82 +1359,93 @@ bool LLAppViewer::frame()
 
 bool LLAppViewer::doFrame()
 {
-	LL_RECORD_BLOCK_TIME(FTM_FRAME);
+    LL_RECORD_BLOCK_TIME(FTM_FRAME);
+    {
+    // and now adjust the visuals from previous frame.
+    if(LLPerfStats::tunables.userAutoTuneEnabled && LLPerfStats::tunables.tuningFlag != LLPerfStats::Tunables::Nothing)
+    {
+        LLPerfStats::tunables.applyUpdates();
+    }
 
+    LLPerfStats::RecordSceneTime T (LLPerfStats::StatType_t::RENDER_FRAME);
     if (!LLWorld::instanceExists())
     {
         LLWorld::createInstance();
     }
 
-	LLEventPump& mainloop(LLEventPumps::instance().obtain("mainloop"));
-	LLSD newFrame;
-
-	{
-        LL_PROFILE_ZONE_NAMED_CATEGORY_APP("df LLTrace");
-        if (LLFloaterReg::instanceVisible("block_timers"))
+    LLEventPump& mainloop(LLEventPumps::instance().obtain("mainloop"));
+    LLSD newFrame;
+    {
+        LLPerfStats::RecordSceneTime T (LLPerfStats::StatType_t::RENDER_IDLE); // perf stats
         {
-	LLTrace::BlockTimer::processTimes();
-        }
-        
-	LLTrace::get_frame_recording().nextPeriod();
-	LLTrace::BlockTimer::logStats();
-	}
+            LL_PROFILE_ZONE_NAMED_CATEGORY_APP("df LLTrace");
+            if (LLFloaterReg::instanceVisible("block_timers"))
+            {
+                LLTrace::BlockTimer::processTimes();
+            }
 
-	LLTrace::get_thread_recorder()->pullFromChildren();
+            LLTrace::get_frame_recording().nextPeriod();
+            LLTrace::BlockTimer::logStats();
+        }
 
-	//clear call stack records
-	LL_CLEAR_CALLSTACKS();
+        LLTrace::get_thread_recorder()->pullFromChildren();
 
-	{
-		LL_PROFILE_ZONE_NAMED_CATEGORY_APP( "df processMiscNativeEvents" )
-		pingMainloopTimeout("Main:MiscNativeWindowEvents");
+        //clear call stack records
+        LL_CLEAR_CALLSTACKS();
+    }
+    {
+        {
+            LLPerfStats::RecordSceneTime T(LLPerfStats::StatType_t::RENDER_IDLE); // ensure we have the entire top scope of frame covered (input event and coro)
+            LL_PROFILE_ZONE_NAMED_CATEGORY_APP("df processMiscNativeEvents")
+            pingMainloopTimeout("Main:MiscNativeWindowEvents");
 
-		if (gViewerWindow)
-		{
-            LL_PROFILE_ZONE_NAMED_CATEGORY_APP("System Messages");
-			gViewerWindow->getWindow()->processMiscNativeEvents();
-		}
+            if (gViewerWindow)
+            {
+                LL_PROFILE_ZONE_NAMED_CATEGORY_APP("System Messages");
+                gViewerWindow->getWindow()->processMiscNativeEvents();
+            }
 
-		{
-			LL_PROFILE_ZONE_NAMED_CATEGORY_APP( "df gatherInput" )
-		pingMainloopTimeout("Main:GatherInput");
-		}
+            {
+                LL_PROFILE_ZONE_NAMED_CATEGORY_APP("df gatherInput")
+                pingMainloopTimeout("Main:GatherInput");
+            }
 
-		if (gViewerWindow)
-		{
-            LL_PROFILE_ZONE_NAMED_CATEGORY_APP("System Messages");
-			if (!restoreErrorTrap())
-			{
-				LL_WARNS() << " Someone took over my signal/exception handler (post messagehandling)!" << LL_ENDL;
-			}
+            if (gViewerWindow)
+            {
+                LL_PROFILE_ZONE_NAMED_CATEGORY_APP("System Messages");
+                if (!restoreErrorTrap())
+                {
+                    LL_WARNS() << " Someone took over my signal/exception handler (post messagehandling)!" << LL_ENDL;
+                }
 
-			gViewerWindow->getWindow()->gatherInput();
-		}
+                gViewerWindow->getWindow()->gatherInput();
+            }
 
-		//memory leaking simulation
-		if (gSimulateMemLeak)
-		{
-			LLFloaterMemLeak* mem_leak_instance =
-				LLFloaterReg::findTypedInstance<LLFloaterMemLeak>("mem_leaking");
-			if (mem_leak_instance)
-			{
-				mem_leak_instance->idle();
-			}
-		}
+            //memory leaking simulation
+            if (gSimulateMemLeak)
+            {
+                LLFloaterMemLeak* mem_leak_instance =
+                    LLFloaterReg::findTypedInstance<LLFloaterMemLeak>("mem_leaking");
+                if (mem_leak_instance)
+                {
+                    mem_leak_instance->idle();
+                }
+            }
 
-		{
-			LL_PROFILE_ZONE_NAMED_CATEGORY_APP( "df mainloop" )
-		// canonical per-frame event
-		mainloop.post(newFrame);
-		}
+            {
+                LL_PROFILE_ZONE_NAMED_CATEGORY_APP("df mainloop")
+                // canonical per-frame event
+                mainloop.post(newFrame);
+            }
 
-		{
-			LL_PROFILE_ZONE_NAMED_CATEGORY_APP( "df suspend" )
-		// give listeners a chance to run
-		llcoro::suspend();
-		// if one of our coroutines threw an uncaught exception, rethrow it now
-		LLCoros::instance().rethrow();
-		}
+            {
+                LL_PROFILE_ZONE_NAMED_CATEGORY_APP("df suspend")
+                // give listeners a chance to run
+                llcoro::suspend();
+                // if one of our coroutines threw an uncaught exception, rethrow it now
+                LLCoros::instance().rethrow();
+            }
+        }
 
 		if (!LLApp::isExiting())
 		{
@@ -1451,6 +1463,7 @@ bool LLAppViewer::doFrame()
 				&& (gHeadlessClient || !gViewerWindow->getShowProgress())
 				&& !gFocusMgr.focusLocked())
 			{
+                LLPerfStats::RecordSceneTime T (LLPerfStats::StatType_t::RENDER_IDLE);
 				joystick->scanJoystick();
 				gKeyboard->scanKeyboard();
                 gViewerInput.scanMouse();
@@ -1464,7 +1477,8 @@ bool LLAppViewer::doFrame()
 				}
 
 				{
-					LL_PROFILE_ZONE_NAMED_CATEGORY_APP("df idle");
+                    LLPerfStats::RecordSceneTime T (LLPerfStats::StatType_t::RENDER_IDLE);
+                    LL_PROFILE_ZONE_NAMED_CATEGORY_APP("df idle");
 					idle();
 				}
 
@@ -1499,6 +1513,7 @@ bool LLAppViewer::doFrame()
                 display();
 
                 {
+                    LLPerfStats::RecordSceneTime T(LLPerfStats::StatType_t::RENDER_IDLE);
                     LL_PROFILE_ZONE_NAMED_CATEGORY_APP("df Snapshot");
                     pingMainloopTimeout("Main:Snapshot");
                     gPipeline.mReflectionMapManager.update();
@@ -1550,7 +1565,8 @@ bool LLAppViewer::doFrame()
 				// of equal priority on Windows
 				if (milliseconds_to_sleep > 0)
 				{
-					ms_sleep(milliseconds_to_sleep);
+                    LLPerfStats::RecordSceneTime T ( LLPerfStats::StatType_t::RENDER_SLEEP );
+                    ms_sleep(milliseconds_to_sleep);
 					// also pause worker threads during this wait period
 					LLAppViewer::getTextureCache()->pause();
 				}
@@ -1637,7 +1653,7 @@ bool LLAppViewer::doFrame()
 
 		LL_INFOS() << "Exiting main_loop" << LL_ENDL;
 	}
-
+    }LLPerfStats::StatsRecorder::endFrame();
     LL_PROFILER_FRAME_END
 
 	return ! LLApp::isRunning();
@@ -2996,15 +3012,9 @@ void LLAppViewer::initStrings()
 	}
 }
 
-//
-// This function decides whether the client machine meets the minimum requirements to
-// run in a maximized window, per the consensus of davep, boa and nyx on 3/30/2011.
-//
 bool LLAppViewer::meetsRequirementsForMaximizedStart()
 {
-	bool maximizedOk = (LLFeatureManager::getInstance()->getGPUClass() >= GPU_CLASS_2);
-
-	maximizedOk &= (gSysMemory.getPhysicalMemoryKB() >= U32Gigabytes(1));
+    bool maximizedOk = (gSysMemory.getPhysicalMemoryKB() >= U32Gigabytes(1));
 
 	return maximizedOk;
 }
diff --git a/indra/newview/llavatarrendernotifier.cpp b/indra/newview/llavatarrendernotifier.cpp
index 94584a623b..8b09f7903d 100644
--- a/indra/newview/llavatarrendernotifier.cpp
+++ b/indra/newview/llavatarrendernotifier.cpp
@@ -235,6 +235,12 @@ void LLAvatarRenderNotifier::updateNotificationAgent(U32 agentComplexity)
     // save the value for use in following messages
     mLatestAgentComplexity = agentComplexity;
 
+    static LLCachedControl<U32> show_my_complexity_changes(gSavedSettings, "ShowMyComplexityChanges", 20);
+    if (!show_my_complexity_changes)
+    {
+        return;
+    }
+
     if (!isAgentAvatarValid() || !gAgentWearables.areWearablesLoaded())
     {
         // data not ready, nothing to show.
@@ -282,7 +288,8 @@ static const char* e_hud_messages[] =
 };
 
 LLHUDRenderNotifier::LLHUDRenderNotifier() :
-mReportedHUDWarning(WARN_NONE)
+mReportedHUDWarning(WARN_NONE),
+mHUDsCount(0)
 {
 }
 
@@ -298,6 +305,15 @@ void LLHUDRenderNotifier::updateNotificationHUD(hud_complexity_list_t complexity
         return;
     }
 
+    mHUDComplexityList = complexity;
+    mHUDsCount = mHUDComplexityList.size();
+
+    static LLCachedControl<U32> show_my_complexity_changes(gSavedSettings, "ShowMyComplexityChanges", 20);
+    if (!show_my_complexity_changes)
+    {
+        return;
+    }
+        
     // TODO:
     // Find a way to show message with list of issues, but without making it too large
     // and intrusive.
diff --git a/indra/newview/llavatarrendernotifier.h b/indra/newview/llavatarrendernotifier.h
index ec17b3d9e6..37130bfcf6 100644
--- a/indra/newview/llavatarrendernotifier.h
+++ b/indra/newview/llavatarrendernotifier.h
@@ -63,6 +63,25 @@ struct LLHUDComplexity
 
 typedef std::list<LLHUDComplexity> hud_complexity_list_t;
 
+struct LLObjectComplexity
+{
+    LLObjectComplexity()
+    {
+        reset();
+    }
+    void reset()
+    {
+        objectId = LLUUID::null;
+        objectName = "";
+        objectCost = 0;
+    }
+    LLUUID objectId;
+    std::string objectName;
+    U32 objectCost;
+};
+
+typedef std::list<LLObjectComplexity> object_complexity_list_t;
+
 // Class to notify user about drastic changes in agent's render weights or if other agents
 // reported that user's agent is too 'heavy' for their settings
 class LLAvatarRenderNotifier : public LLSingleton<LLAvatarRenderNotifier>
@@ -77,6 +96,9 @@ public:
     void updateNotificationState();
 	void updateNotificationAgent(U32 agentComplexity);
 
+    void setObjectComplexityList(object_complexity_list_t object_list) { mObjectComplexityList = object_list; }
+    object_complexity_list_t getObjectComplexityList() { return mObjectComplexityList; }
+
 private:
 
 	LLNotificationPtr mNotificationPtr;
@@ -109,6 +131,8 @@ private:
     // Used to detect changes in voavatar's rezzed status.
     // If value decreases - there were changes in outfit.
     S32 mLastOutfitRezStatus;
+
+    object_complexity_list_t mObjectComplexityList;
 };
 
 // Class to notify user about heavy set of HUD
@@ -121,6 +145,9 @@ public:
     void updateNotificationHUD(hud_complexity_list_t complexity);
     bool isNotificationVisible();
 
+    hud_complexity_list_t getHUDComplexityList() { return mHUDComplexityList; }
+    S32 getHUDsCount() { return mHUDsCount; }
+
 private:
     enum EWarnLevel
     {
@@ -141,6 +168,8 @@ private:
     EWarnLevel mReportedHUDWarning;
     LLHUDComplexity mLatestHUDComplexity;
     LLFrameTimer mHUDPopUpDelayTimer;
+    hud_complexity_list_t mHUDComplexityList;
+    S32 mHUDsCount;
 };
 
 #endif /* ! defined(LL_llavatarrendernotifier_H) */
diff --git a/indra/newview/lldrawpool.cpp b/indra/newview/lldrawpool.cpp
index 3de0e8a7c4..edabb55cc3 100644
--- a/indra/newview/lldrawpool.cpp
+++ b/indra/newview/lldrawpool.cpp
@@ -52,6 +52,7 @@
 #include "llglcommonfunc.h"
 #include "llvoavatar.h"
 #include "llviewershadermgr.h"
+#include "llperfstats.h"
 
 
 S32 LLDrawPool::sNumDrawPools = 0;
@@ -385,13 +386,24 @@ void LLRenderPass::renderGroup(LLSpatialGroup* group, U32 type, bool texture)
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_DRAWPOOL;
 	LLSpatialGroup::drawmap_elem_t& draw_info = group->mDrawMap[type];
-	
+
+    std::unique_ptr<LLPerfStats::RecordAttachmentTime> ratPtr{}; // Perf stats 
 	for (LLSpatialGroup::drawmap_elem_t::iterator k = draw_info.begin(); k != draw_info.end(); ++k)	
 	{
 		LLDrawInfo *pparams = *k;
 		if (pparams) 
         {
-			pushBatch(*pparams, texture);
+#if 0 // TODO SL-19656 figure out how to reenable trackAttachments()
+            if(pparams->mFace)
+            {
+                LLViewerObject* vobj = pparams->mFace->getViewerObject();
+                if(vobj->isAttachment())
+                {
+                    trackAttachments(vobj, false, &ratPtr);
+                }
+            }
+#endif
+            pushBatch(*pparams, texture);
 		}
 	}
 }
@@ -403,11 +415,23 @@ void LLRenderPass::renderRiggedGroup(LLSpatialGroup* group, U32 type, bool textu
     LLVOAvatar* lastAvatar = nullptr;
     U64 lastMeshId = 0;
     
+    std::unique_ptr<LLPerfStats::RecordAttachmentTime> ratPtr{}; // Perf stats 
     for (LLSpatialGroup::drawmap_elem_t::iterator k = draw_info.begin(); k != draw_info.end(); ++k)
     {
         LLDrawInfo* pparams = *k;
         if (pparams) 
         {
+#if 0 // TODO SL-19656 figure out how to reenable trackAttachments()
+            if(pparams->mFace)
+            {
+                LLViewerObject* vobj = pparams->mFace->getViewerObject();
+                if(vobj->isAttachment())
+                {
+                    trackAttachments( vobj, true ,&ratPtr);
+                }
+            }
+#endif
+
             if (lastAvatar != pparams->mAvatar || lastMeshId != pparams->mSkinInfo->mHash)
             {
                 uploadMatrixPalette(*pparams);
@@ -420,93 +444,10 @@ void LLRenderPass::renderRiggedGroup(LLSpatialGroup* group, U32 type, bool textu
     }
 }
 
-void setup_texture_matrix(LLDrawInfo& params)
-{
-    if (params.mTextureMatrix)
-    { //special case implementation of texture animation here because of special handling of textures for PBR batches
-        gGL.getTexUnit(0)->activate();
-        gGL.matrixMode(LLRender::MM_TEXTURE);
-        gGL.loadMatrix((GLfloat*)params.mTextureMatrix->mMatrix);
-        gPipeline.mTextureMatrixOps++;
-    }
-}
-
-void teardown_texture_matrix(LLDrawInfo& params)
-{
-    if (params.mTextureMatrix)
-    {
-        gGL.matrixMode(LLRender::MM_TEXTURE0);
-        gGL.loadIdentity();
-        gGL.matrixMode(LLRender::MM_MODELVIEW);
-    }
-}
-
-void LLRenderPass::pushGLTFBatches(U32 type)
-{
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_DRAWPOOL;
-    auto* begin = gPipeline.beginRenderMap(type);
-    auto* end = gPipeline.endRenderMap(type);
-    for (LLCullResult::drawinfo_iterator i = begin; i != end; )
-    {
-        LL_PROFILE_ZONE_NAMED_CATEGORY_DRAWPOOL("pushGLTFBatch");
-        LLDrawInfo& params = **i;
-        LLCullResult::increment_iterator(i, end);
-
-        pushGLTFBatch(params);
-    }
-}
-
-void LLRenderPass::pushGLTFBatch(LLDrawInfo& params)
-{
-    auto& mat = params.mGLTFMaterial;
-
-    mat->bind(params.mTexture);
-
-    LLGLDisable cull_face(mat->mDoubleSided ? GL_CULL_FACE : 0);
-
-    setup_texture_matrix(params);
-    
-    applyModelMatrix(params);
-
-    params.mVertexBuffer->setBuffer();
-    params.mVertexBuffer->drawRange(LLRender::TRIANGLES, params.mStart, params.mEnd, params.mCount, params.mOffset);
-
-    teardown_texture_matrix(params);
-}
-
-void LLRenderPass::pushRiggedGLTFBatches(U32 type)
-{
-    LL_PROFILE_ZONE_SCOPED_CATEGORY_DRAWPOOL;
-    LLVOAvatar* lastAvatar = nullptr;
-    U64 lastMeshId = 0;
-
-    auto* begin = gPipeline.beginRenderMap(type);
-    auto* end = gPipeline.endRenderMap(type);
-    for (LLCullResult::drawinfo_iterator i = begin; i != end; )
-    {
-        LL_PROFILE_ZONE_NAMED_CATEGORY_DRAWPOOL("pushRiggedGLTFBatch");
-        LLDrawInfo& params = **i;
-        LLCullResult::increment_iterator(i, end);
-
-        pushRiggedGLTFBatch(params, lastAvatar, lastMeshId);
-    }
-}
-
-void LLRenderPass::pushRiggedGLTFBatch(LLDrawInfo& params, LLVOAvatar*& lastAvatar, U64& lastMeshId)
-{
-    if (params.mAvatar.notNull() && (lastAvatar != params.mAvatar || lastMeshId != params.mSkinInfo->mHash))
-    {
-        uploadMatrixPalette(params);
-        lastAvatar = params.mAvatar;
-        lastMeshId = params.mSkinInfo->mHash;
-    }
-
-    pushGLTFBatch(params);
-}
-
 void LLRenderPass::pushBatches(U32 type, bool texture, bool batch_textures, bool reset_gltf)
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_DRAWPOOL;
+    std::unique_ptr<LLPerfStats::RecordAttachmentTime> ratPtr{};
     auto* begin = gPipeline.beginRenderMap(type);
     auto* end = gPipeline.endRenderMap(type);
     for (LLCullResult::drawinfo_iterator i = begin; i != end; )
@@ -514,8 +455,17 @@ void LLRenderPass::pushBatches(U32 type, bool texture, bool batch_textures, bool
         LLDrawInfo* pparams = *i;
         LLCullResult::increment_iterator(i, end);
 
-		pushBatch(*pparams, texture, batch_textures, reset_gltf);
-        reset_gltf = false;
+#if 0 // TODO SL-19656 figure out how to reenable trackAttachments()
+            if(pparams->mFace)
+            {
+                LLViewerObject* vobj = pparams->mFace->getViewerObject();
+                if(vobj->isAttachment())
+                {
+                    trackAttachments( vobj, false, &ratPtr);
+                }
+            }
+#endif
+            pushBatch(*pparams, texture, batch_textures, reset_gltf);
 	}
 }
 
@@ -526,11 +476,23 @@ void LLRenderPass::pushRiggedBatches(U32 type, bool texture, bool batch_textures
     U64 lastMeshId = 0;
     auto* begin = gPipeline.beginRenderMap(type);
     auto* end = gPipeline.endRenderMap(type);
+    std::unique_ptr<LLPerfStats::RecordAttachmentTime> ratPtr{}; // Perf stats 
     for (LLCullResult::drawinfo_iterator i = begin; i != end; )
     {
         LLDrawInfo* pparams = *i;
         LLCullResult::increment_iterator(i, end);
 
+#if 0 // TODO SL-19656 figure out how to reenable trackAttachments()
+            if(pparams->mFace)
+            {
+                LLViewerObject* vobj = pparams->mFace->getViewerObject();
+                if(vobj->isAttachment())
+                {
+                    trackAttachments( vobj, true, &ratPtr);
+                }
+            }
+#endif
+
         if (pparams->mAvatar.notNull() && (lastAvatar != pparams->mAvatar || lastMeshId != pparams->mSkinInfo->mHash))
         {
             uploadMatrixPalette(*pparams);
@@ -546,12 +508,23 @@ void LLRenderPass::pushRiggedBatches(U32 type, bool texture, bool batch_textures
 void LLRenderPass::pushMaskBatches(U32 type, bool texture, bool batch_textures, bool reset_gltf)
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_DRAWPOOL;
+    std::unique_ptr<LLPerfStats::RecordAttachmentTime> ratPtr{};
     auto* begin = gPipeline.beginRenderMap(type);
     auto* end = gPipeline.endRenderMap(type);
 	for (LLCullResult::drawinfo_iterator i = begin; i != end; )
 	{
         LLDrawInfo* pparams = *i;
         LLCullResult::increment_iterator(i, end);
+#if 0 // TODO SL-19656 figure out how to reenable trackAttachments()
+            if((*pparams).mFace)
+            {
+                LLViewerObject* vobj = (*pparams).mFace->getViewerObject();
+                if(vobj->isAttachment())
+                {
+                    trackAttachments( vobj, false, &ratPtr);
+                }
+            }
+#endif
 		LLGLSLShader::sCurBoundShaderPtr->setMinimumAlpha(pparams->mAlphaMaskCutoff);
 		pushBatch(*pparams, texture, batch_textures, reset_gltf);
         reset_gltf = false;
@@ -563,6 +536,7 @@ void LLRenderPass::pushRiggedMaskBatches(U32 type, bool texture, bool batch_text
     LL_PROFILE_ZONE_SCOPED_CATEGORY_DRAWPOOL;
     LLVOAvatar* lastAvatar = nullptr;
     U64 lastMeshId = 0;
+    std::unique_ptr<LLPerfStats::RecordAttachmentTime> ratPtr{};
     auto* begin = gPipeline.beginRenderMap(type);
     auto* end = gPipeline.endRenderMap(type);
     for (LLCullResult::drawinfo_iterator i = begin; i != end; )
@@ -571,6 +545,18 @@ void LLRenderPass::pushRiggedMaskBatches(U32 type, bool texture, bool batch_text
 
         LLCullResult::increment_iterator(i, end);
 
+        llassert(pparams);
+#if 0 // TODO SL-19656 figure out how to reenable trackAttachments()
+        if((*pparams).mFace)
+        {
+            LLViewerObject* vobj = (*pparams).mFace->getViewerObject();
+            if(vobj->isAttachment())
+            {
+                trackAttachments( vobj, true, &ratPtr);
+            }
+        }
+#endif
+
         if (LLGLSLShader::sCurBoundShaderPtr)
         {
             LLGLSLShader::sCurBoundShaderPtr->setMinimumAlpha(pparams->mAlphaMaskCutoff);
@@ -702,3 +688,87 @@ bool LLRenderPass::uploadMatrixPalette(LLVOAvatar* avatar, LLMeshSkinInfo* skinI
     return true;
 }
 
+void setup_texture_matrix(LLDrawInfo& params)
+{
+    if (params.mTextureMatrix)
+    { //special case implementation of texture animation here because of special handling of textures for PBR batches
+        gGL.getTexUnit(0)->activate();
+        gGL.matrixMode(LLRender::MM_TEXTURE);
+        gGL.loadMatrix((GLfloat*)params.mTextureMatrix->mMatrix);
+        gPipeline.mTextureMatrixOps++;
+    }
+}
+
+void teardown_texture_matrix(LLDrawInfo& params)
+{
+    if (params.mTextureMatrix)
+    {
+        gGL.matrixMode(LLRender::MM_TEXTURE0);
+        gGL.loadIdentity();
+        gGL.matrixMode(LLRender::MM_MODELVIEW);
+    }
+}
+
+void LLRenderPass::pushGLTFBatches(U32 type)
+{
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_DRAWPOOL;
+    auto* begin = gPipeline.beginRenderMap(type);
+    auto* end = gPipeline.endRenderMap(type);
+    for (LLCullResult::drawinfo_iterator i = begin; i != end; )
+    {
+        LL_PROFILE_ZONE_NAMED_CATEGORY_DRAWPOOL("pushGLTFBatch");
+        LLDrawInfo& params = **i;
+        LLCullResult::increment_iterator(i, end);
+
+        pushGLTFBatch(params);
+    }
+}
+
+void LLRenderPass::pushGLTFBatch(LLDrawInfo& params)
+{
+    auto& mat = params.mGLTFMaterial;
+
+    mat->bind(params.mTexture);
+
+    LLGLDisable cull_face(mat->mDoubleSided ? GL_CULL_FACE : 0);
+
+    setup_texture_matrix(params);
+
+    applyModelMatrix(params);
+
+    params.mVertexBuffer->setBuffer();
+    params.mVertexBuffer->drawRange(LLRender::TRIANGLES, params.mStart, params.mEnd, params.mCount, params.mOffset);
+
+    teardown_texture_matrix(params);
+}
+
+void LLRenderPass::pushRiggedGLTFBatches(U32 type)
+{
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_DRAWPOOL;
+    LLVOAvatar* lastAvatar = nullptr;
+    U64 lastMeshId = 0;
+
+    auto* begin = gPipeline.beginRenderMap(type);
+    auto* end = gPipeline.endRenderMap(type);
+    for (LLCullResult::drawinfo_iterator i = begin; i != end; )
+    {
+        LL_PROFILE_ZONE_NAMED_CATEGORY_DRAWPOOL("pushRiggedGLTFBatch");
+        LLDrawInfo& params = **i;
+        LLCullResult::increment_iterator(i, end);
+
+        pushRiggedGLTFBatch(params, lastAvatar, lastMeshId);
+    }
+}
+
+void LLRenderPass::pushRiggedGLTFBatch(LLDrawInfo& params, LLVOAvatar*& lastAvatar, U64& lastMeshId)
+{
+    if (params.mAvatar.notNull() && (lastAvatar != params.mAvatar || lastMeshId != params.mSkinInfo->mHash))
+    {
+        uploadMatrixPalette(params);
+        lastAvatar = params.mAvatar;
+        lastMeshId = params.mSkinInfo->mHash;
+    }
+
+    pushGLTFBatch(params);
+}
+
diff --git a/indra/newview/lldrawpoolalpha.cpp b/indra/newview/lldrawpoolalpha.cpp
index 280be162bc..da4c963a97 100644
--- a/indra/newview/lldrawpoolalpha.cpp
+++ b/indra/newview/lldrawpoolalpha.cpp
@@ -49,6 +49,7 @@
 #include "llspatialpartition.h"
 #include "llglcommonfunc.h"
 #include "llvoavatar.h"
+#include "llperfstats.h"
 
 #include "llenvironment.h"
 
@@ -348,10 +349,22 @@ void LLDrawPoolAlpha::renderAlphaHighlight(U32 mask)
             {
                 LLSpatialGroup::drawmap_elem_t& draw_info = group->mDrawMap[LLRenderPass::PASS_ALPHA+pass]; // <-- hacky + pass to use PASS_ALPHA_RIGGED on second pass 
 
+                std::unique_ptr<LLPerfStats::RecordAttachmentTime> ratPtr{}; // Render time Stats collection
                 for (LLSpatialGroup::drawmap_elem_t::iterator k = draw_info.begin(); k != draw_info.end(); ++k)
                 {
                     LLDrawInfo& params = **k;
 
+# if 0 // TODO SL-19656 figure out how to reenable trackAttachments()
+                    if(params.mFace)
+                    {
+                        LLViewerObject* vobj = (LLViewerObject *)params.mFace->getViewerObject();
+                        if(vobj->isAttachment())
+                        {
+                            trackAttachments( vobj, params.mFace->isState(LLFace::RIGGED), &ratPtr );
+                        }
+                    }
+#endif
+
                     bool rigged = (params.mAvatar != nullptr);
                     gHighlightProgram.bind(rigged);
                     gGL.diffuseColor4f(1, 0, 0, 1);
@@ -535,8 +548,18 @@ void LLDrawPoolAlpha::renderRiggedEmissives(std::vector<LLDrawInfo*>& emissives)
     LLVOAvatar* lastAvatar = nullptr;
     U64 lastMeshId = 0;
 
+    std::unique_ptr<LLPerfStats::RecordAttachmentTime> ratPtr{}; // Render time Stats collection
     for (LLDrawInfo* draw : emissives)
     {
+        LL_PROFILE_ZONE_NAMED_CATEGORY_DRAWPOOL("Emissives");
+# if 0 // TODO SL-19656 figure out how to reenable trackAttachments()
+        auto vobj = draw->mFace?draw->mFace->getViewerObject():nullptr;
+        if(vobj && vobj->isAttachment())
+        {
+            trackAttachments( vobj, draw->mFace->isState(LLFace::RIGGED), &ratPtr );
+        }
+#endif
+
         bool tex_setup = TexSetup(draw, false);
         if (lastAvatar != draw->mAvatar || lastMeshId != draw->mSkinInfo->mHash)
         {
@@ -664,7 +687,8 @@ void LLDrawPoolAlpha::renderAlpha(U32 mask, bool depth_only, bool rigged)
 
 			LLSpatialGroup::drawmap_elem_t& draw_info = rigged ? group->mDrawMap[LLRenderPass::PASS_ALPHA_RIGGED] : group->mDrawMap[LLRenderPass::PASS_ALPHA];
 
-			for (LLSpatialGroup::drawmap_elem_t::iterator k = draw_info.begin(); k != draw_info.end(); ++k)	
+            std::unique_ptr<LLPerfStats::RecordAttachmentTime> ratPtr{}; // Render time Stats collection
+            for (LLSpatialGroup::drawmap_elem_t::iterator k = draw_info.begin(); k != draw_info.end(); ++k)	
 			{
 				LLDrawInfo& params = **k;
                 if ((bool)params.mAvatar != rigged)
@@ -676,6 +700,18 @@ void LLDrawPoolAlpha::renderAlpha(U32 mask, bool depth_only, bool rigged)
 
                 LLRenderPass::applyModelMatrix(params);
 
+# if 0 // TODO SL-19656 figure out how to reenable trackAttachments()
+                if(params.mFace)
+                {
+                    LLViewerObject* vobj = (LLViewerObject *)params.mFace->getViewerObject();
+
+                    if(vobj->isAttachment())
+                    {
+                        trackAttachments( vobj, params.mFace->isState(LLFace::RIGGED), &ratPtr );
+                    }
+                }
+#endif
+
                 LLMaterial* mat = NULL;
                 LLGLTFMaterial *gltf_mat = params.mGLTFMaterial; 
 
@@ -869,6 +905,8 @@ void LLDrawPoolAlpha::renderAlpha(U32 mask, bool depth_only, bool rigged)
 				}
 			}
 
+            ratPtr.reset(); // force the final batch to terminate to avoid double counting on the subsidiary batches for FB and Emmissives
+
             // render emissive faces into alpha channel for bloom effects
             if (!depth_only)
             {
diff --git a/indra/newview/lldrawpoolavatar.cpp b/indra/newview/lldrawpoolavatar.cpp
index 9820202f9b..c398087b20 100644
--- a/indra/newview/lldrawpoolavatar.cpp
+++ b/indra/newview/lldrawpoolavatar.cpp
@@ -52,6 +52,7 @@
 #include "llviewerpartsim.h"
 #include "llviewercontrol.h" // for gSavedSettings
 #include "llviewertexturelist.h"
+#include "llperfstats.h"
 
 static U32 sShaderLevel = 0;
 
@@ -369,9 +370,12 @@ void LLDrawPoolAvatar::renderShadow(S32 pass)
 	{
 		return;
 	}
+    LLPerfStats::RecordAvatarTime T(avatarp->getID(), LLPerfStats::StatType_t::RENDER_SHADOWS);
+
 	LLVOAvatar::AvatarOverallAppearance oa = avatarp->getOverallAppearance();
 	BOOL impostor = !LLPipeline::sImpostorRender && avatarp->isImpostor();
-    if (impostor || (oa == LLVOAvatar::AOA_INVISIBLE))
+    // no shadows if the shadows are causing this avatar to breach the limit.
+    if (avatarp->isTooSlow() || impostor || (oa == LLVOAvatar::AOA_INVISIBLE))
 	{
         // No shadows for impostored (including jellydolled) or invisible avs.
 		return;
@@ -737,6 +741,7 @@ void LLDrawPoolAvatar::renderAvatars(LLVOAvatar* single_avatar, S32 pass)
 	{
 		return;
 	}
+    LLPerfStats::RecordAvatarTime T(avatarp->getID(), LLPerfStats::StatType_t::RENDER_GEOMETRY);
 
 	if (!single_avatar && !avatarp->isFullyLoaded() )
 	{
diff --git a/indra/newview/lldrawpoolbump.cpp b/indra/newview/lldrawpoolbump.cpp
index 35265b6df0..75b47b2c22 100644
--- a/indra/newview/lldrawpoolbump.cpp
+++ b/indra/newview/lldrawpoolbump.cpp
@@ -49,6 +49,7 @@
 #include "llspatialpartition.h"
 #include "llviewershadermgr.h"
 #include "llmodel.h"
+#include "llperfstats.h"
 
 //#include "llimagebmp.h"
 //#include "../tools/imdebug/imdebug.h"
@@ -405,10 +406,19 @@ void LLDrawPoolBump::renderGroup(LLSpatialGroup* group, U32 type, bool texture =
 {					
 	LLSpatialGroup::drawmap_elem_t& draw_info = group->mDrawMap[type];	
 	
-	for (LLSpatialGroup::drawmap_elem_t::iterator k = draw_info.begin(); k != draw_info.end(); ++k) 
+    std::unique_ptr<LLPerfStats::RecordAttachmentTime> ratPtr{};
+    for (LLSpatialGroup::drawmap_elem_t::iterator k = draw_info.begin(); k != draw_info.end(); ++k) 
 	{
 		LLDrawInfo& params = **k;
 		
+#if 0 // TODO SL-19656 figure out how to reenable trackAttachments()
+        LLViewerObject* vobj = (LLViewerObject *)params.mFace->getViewerObject();
+        if( vobj && vobj->isAttachment() )
+        {
+            trackAttachments( vobj, params.mFace->isState(LLFace::RIGGED), &ratPtr );
+        }
+#endif
+
 		applyModelMatrix(params);
 
 		params.mVertexBuffer->setBuffer();
@@ -558,12 +568,25 @@ void LLDrawPoolBump::renderDeferred(S32 pass)
         LLVOAvatar* avatar = nullptr;
         U64 skin = 0;
 
+        std::unique_ptr<LLPerfStats::RecordAttachmentTime> ratPtr{};
         for (LLCullResult::drawinfo_iterator i = begin; i != end; )
         {
             LLDrawInfo& params = **i;
 
             LLCullResult::increment_iterator(i, end);
 
+#if 0 // TODO SL-19656 figure out how to reenable trackAttachments()
+            if(params.mFace)
+            {
+                LLViewerObject* vobj = (LLViewerObject *)params.mFace->getViewerObject();
+
+                if(vobj && vobj->isAttachment())
+                {
+                    trackAttachments( vobj, params.mFace->isState(LLFace::RIGGED), &ratPtr );
+                }
+            }
+#endif
+
             LLGLSLShader::sCurBoundShaderPtr->setMinimumAlpha(params.mAlphaMaskCutoff);
             LLDrawPoolBump::bindBumpMap(params, bump_channel);
 
@@ -1192,10 +1215,23 @@ void LLDrawPoolBump::pushBumpBatches(U32 type)
     LLCullResult::drawinfo_iterator begin = gPipeline.beginRenderMap(type);
     LLCullResult::drawinfo_iterator end = gPipeline.endRenderMap(type);
 
+    std::unique_ptr<LLPerfStats::RecordAttachmentTime> ratPtr{};
 	for (LLCullResult::drawinfo_iterator i = begin; i != end; ++i)	
 	{
 		LLDrawInfo& params = **i;
 
+#if 0 // TODO SL-19656 figure out how to reenable trackAttachments()
+        if(params.mFace)
+        {
+            LLViewerObject* vobj = (LLViewerObject *)params.mFace->getViewerObject();
+
+            if( vobj && vobj->isAttachment() )
+            {
+                trackAttachments( vobj, params.mFace->isState(LLFace::RIGGED), &ratPtr );
+            }
+        }
+#endif
+
 		if (LLDrawPoolBump::bindBumpMap(params))
 		{
             if (mRigged)
diff --git a/indra/newview/lldrawpoolmaterials.cpp b/indra/newview/lldrawpoolmaterials.cpp
index 6a7e05ac74..e025651cce 100644
--- a/indra/newview/lldrawpoolmaterials.cpp
+++ b/indra/newview/lldrawpoolmaterials.cpp
@@ -32,6 +32,7 @@
 #include "pipeline.h"
 #include "llglcommonfunc.h"
 #include "llvoavatar.h"
+#include "llperfstats.h"
 
 LLDrawPoolMaterials::LLDrawPoolMaterials()
 :  LLRenderPass(LLDrawPool::POOL_MATERIALS)
@@ -150,6 +151,7 @@ void LLDrawPoolMaterials::renderDeferred(S32 pass)
 	LLCullResult::drawinfo_iterator begin = gPipeline.beginRenderMap(type);
 	LLCullResult::drawinfo_iterator end = gPipeline.endRenderMap(type);
 	
+    std::unique_ptr<LLPerfStats::RecordAttachmentTime> ratPtr{};
     F32 lastIntensity = 0.f;
     F32 lastFullbright = 0.f;
     F32 lastMinimumAlpha = 0.f;
@@ -199,6 +201,18 @@ void LLDrawPoolMaterials::renderDeferred(S32 pass)
 		
         LLCullResult::increment_iterator(i, end);
 
+#if 0 // TODO SL-19656 figure out how to reenable trackAttachments()
+        if(params.mFace)
+        {
+            LLViewerObject* vobj = (LLViewerObject *)params.mFace->getViewerObject();
+
+            if( vobj && vobj->isAttachment() )
+            {
+                trackAttachments( vobj, params.mFace->isState(LLFace::RIGGED), &ratPtr );
+            }
+        }
+#endif
+
         if (specular > -1 && params.mSpecColor != lastSpecular)
         {
             lastSpecular = params.mSpecColor;
diff --git a/indra/newview/llfeaturemanager.cpp b/indra/newview/llfeaturemanager.cpp
index 0974ae0742..a2aae91ae1 100644
--- a/indra/newview/llfeaturemanager.cpp
+++ b/indra/newview/llfeaturemanager.cpp
@@ -408,6 +408,7 @@ bool LLFeatureManager::loadGPUClass()
 {
 	if (!gSavedSettings.getBOOL("SkipBenchmark"))
 	{
+		F32 class1_gbps = gSavedSettings.getF32("RenderClass1MemoryBandwidth");
 		//get memory bandwidth from benchmark
 		F32 gbps;
 		try
@@ -424,6 +425,14 @@ bool LLFeatureManager::loadGPUClass()
 			LL_WARNS("RenderInit") << "GPU benchmark failed: " << e.what() << LL_ENDL;
 		}
 	
+        mGPUMemoryBandwidth = gbps;
+
+        // bias by CPU speed
+        F32 cpu_basis_mhz = gSavedSettings.getF32("RenderCPUBasis");
+        F32 cpu_mhz = (F32) gSysCPU.getMHz();
+        F32 cpu_bias = llclamp(cpu_mhz / cpu_basis_mhz, 0.5f, 1.f);
+        gbps *= cpu_bias;
+
 		if (gbps < 0.f)
 		{ //couldn't bench, default to Low
 	#if LL_DARWIN
@@ -434,19 +443,19 @@ bool LLFeatureManager::loadGPUClass()
 			mGPUClass = GPU_CLASS_0;
 	#endif
 		}
-		else if (gbps <= 32.0f)
+		else if (gbps <= class1_gbps)
 		{
 			mGPUClass = GPU_CLASS_1;
 		}
-		else if (gbps <= 64.0f)
+		else if (gbps <= class1_gbps *2.f)
 		{
 			mGPUClass = GPU_CLASS_2;
 		}
-		else if (gbps <= 128.0f)
+		else if (gbps <= class1_gbps*4.f)
 		{
 			mGPUClass = GPU_CLASS_3;
 		}
-		else if (gbps <= 256.0f)
+		else if (gbps <= class1_gbps*8.f)
 		{
 			mGPUClass = GPU_CLASS_4;
 		}
diff --git a/indra/newview/llfeaturemanager.h b/indra/newview/llfeaturemanager.h
index 42a226cd18..651404d890 100644
--- a/indra/newview/llfeaturemanager.h
+++ b/indra/newview/llfeaturemanager.h
@@ -111,6 +111,10 @@ public:
 
 	EGPUClass getGPUClass() 			{ return mGPUClass; }
 	std::string& getGPUString() 		{ return mGPUString; }
+    
+    // get the measured GPU memory bandwidth in GB/sec
+    // may return 0 of benchmark has not been run or failed to run
+    F32 getGPUMemoryBandwidth() { return mGPUMemoryBandwidth; }
 	BOOL isGPUSupported()				{ return mGPUSupported; }
 	F32 getExpectedGLVersion()			{ return mExpectedGLVersion; }
 	
@@ -162,6 +166,7 @@ protected:
 	S32			mTableVersion;
 	BOOL		mSafe;					// Reinitialize everything to the "safe" mask
 	EGPUClass	mGPUClass;
+    F32         mGPUMemoryBandwidth = 0.f;  // measured memory bandwidth of GPU in GB/second
 	F32			mExpectedGLVersion;		//expected GL version according to gpu table
 	std::string	mGPUString;
 	BOOL		mGPUSupported;
diff --git a/indra/newview/llfloater360capture.cpp b/indra/newview/llfloater360capture.cpp
index 542a1ea39b..23f86e2361 100644
--- a/indra/newview/llfloater360capture.cpp
+++ b/indra/newview/llfloater360capture.cpp
@@ -319,13 +319,7 @@ const std::string LLFloater360Capture::getHTMLBaseFolder()
 // triggered when the 'capture' button in the UI is pressed
 void LLFloater360Capture::onCapture360ImagesBtn()
 {
-    // launch the main capture code in a coroutine so we can
-    // yield/suspend at some points to give the main UI
-    // thread a look-in occasionally.
-    LLCoros::instance().launch("capture360cap", [this]()
-    {
-        capture360Images();
-    });
+    capture360Images();
 }
 
 // Gets the full path name for a given JavaScript file in the HTML folder. We
@@ -686,9 +680,6 @@ void LLFloater360Capture::capture360Images()
     mCaptureBtn->setEnabled(true);
     mSaveLocalBtn->setEnabled(true);
 
-    // allow the UI to update by suspending and waiting for the
-    // main render loop to update the UI
-    suspendForAFrame();
 }
 
 // once the request is made to navigate to the web page containing the code
diff --git a/indra/newview/llfloateravatarrendersettings.cpp b/indra/newview/llfloateravatarrendersettings.cpp
index 8b28f6941e..7d098e6c88 100644
--- a/indra/newview/llfloateravatarrendersettings.cpp
+++ b/indra/newview/llfloateravatarrendersettings.cpp
@@ -89,8 +89,6 @@ BOOL LLFloaterAvatarRenderSettings::postBuild()
     LLFloater::postBuild();
     mAvatarSettingsList = getChild<LLNameListCtrl>("render_settings_list");
     mAvatarSettingsList->setRightMouseDownCallback(boost::bind(&LLFloaterAvatarRenderSettings::onAvatarListRightClick, this, _1, _2, _3));
-    mAvatarSettingsList->setAlternateSort();
-    getChild<LLFilterEditor>("people_filter_input")->setCommitCallback(boost::bind(&LLFloaterAvatarRenderSettings::onFilterEdit, this, _2));
 
 	return TRUE;
 }
@@ -134,37 +132,13 @@ void LLFloaterAvatarRenderSettings::updateList()
     {
         item_params.value = iter->first;
         LLAvatarNameCache::get(iter->first, &av_name);
-        if(!isHiddenRow(av_name.getCompleteName()))
-        {
-            item_params.columns.add().value(av_name.getCompleteName()).column("name");
-            std::string setting = getString(iter->second == 1 ? "av_never_render" : "av_always_render");
-            item_params.columns.add().value(setting).column("setting");
-            S32 mute_date = LLRenderMuteList::getInstance()->getVisualMuteDate(iter->first);
-            item_params.columns.add().value(createTimestamp(mute_date)).column("timestamp").alt_value(std::to_string(mute_date));
-            mAvatarSettingsList->addNameItemRow(item_params);
-        }
+        item_params.columns.add().value(av_name.getCompleteName()).column("name");
+        std::string setting = getString(iter->second == 1 ? "av_never_render" : "av_always_render");
+        item_params.columns.add().value(setting).column("setting");
+        mAvatarSettingsList->addNameItemRow(item_params);
     }
 }
 
-void LLFloaterAvatarRenderSettings::onFilterEdit(const std::string& search_string)
-{
-    std::string filter_upper = search_string;
-    LLStringUtil::toUpper(filter_upper);
-    if (mNameFilter != filter_upper)
-    {
-        mNameFilter = filter_upper;
-        mNeedsUpdate = true;
-    }
-}
-
-bool LLFloaterAvatarRenderSettings::isHiddenRow(const std::string& av_name)
-{
-    if (mNameFilter.empty()) return false;
-    std::string upper_name = av_name;
-    LLStringUtil::toUpper(upper_name);
-    return std::string::npos == upper_name.find(mNameFilter);
-}
-
 static LLVOAvatar* find_avatar(const LLUUID& id)
 {
     LLViewerObject *obj = gObjectList.findObject(id);
@@ -215,6 +189,10 @@ bool LLFloaterAvatarRenderSettings::isActionChecked(const LLSD& userdata, const
     {
         return (visual_setting == S32(LLVOAvatar::AV_RENDER_NORMALLY));
     }
+    else if ("non_default" == command_name)
+    {
+        return (visual_setting != S32(LLVOAvatar::AV_RENDER_NORMALLY));
+    }
     else if ("never" == command_name)
     {
         return (visual_setting == S32(LLVOAvatar::AV_DO_NOT_RENDER));
diff --git a/indra/newview/llfloateravatarrendersettings.h b/indra/newview/llfloateravatarrendersettings.h
index 00ee074f17..2e0a844afd 100644
--- a/indra/newview/llfloateravatarrendersettings.h
+++ b/indra/newview/llfloateravatarrendersettings.h
@@ -48,7 +48,6 @@ public:
     void onAvatarListRightClick(LLUICtrl* ctrl, S32 x, S32 y);
 
     void updateList();
-    void onFilterEdit(const std::string& search_string);
     void onCustomAction (const LLSD& userdata, const LLUUID& av_id);
     bool isActionChecked(const LLSD& userdata, const LLUUID& av_id);
     void onClickAdd(const LLSD& userdata);
@@ -59,15 +58,12 @@ public:
     static void setNeedsUpdate();
 
 private:
-    bool isHiddenRow(const std::string& av_name);
     void callbackAvatarPicked(const uuid_vec_t& ids, S32 visual_setting);
     void removePicker();
 
     bool mNeedsUpdate;
     LLListContextMenu* mContextMenu;
     LLNameListCtrl* mAvatarSettingsList;
-
-    std::string mNameFilter;
 };
 
 
diff --git a/indra/newview/llfloaterperformance.cpp b/indra/newview/llfloaterperformance.cpp
new file mode 100644
index 0000000000..3321374f65
--- /dev/null
+++ b/indra/newview/llfloaterperformance.cpp
@@ -0,0 +1,697 @@
+/** 
+ * @file llfloaterperformance.cpp
+ *
+ * $LicenseInfo:firstyear=2021&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2021, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "llviewerprecompiledheaders.h"
+#include "llfloaterperformance.h"
+
+#include "llagent.h"
+#include "llagentcamera.h"
+#include "llappearancemgr.h"
+#include "llavataractions.h"
+#include "llavatarrendernotifier.h"
+#include "llcheckboxctrl.h"
+#include "llcombobox.h"
+#include "llfeaturemanager.h"
+#include "llfloaterpreference.h" // LLAvatarComplexityControls
+#include "llfloaterreg.h"
+#include "llnamelistctrl.h"
+#include "llnotificationsutil.h"
+#include "llperfstats.h"
+#include "llpresetsmanager.h"
+#include "llradiogroup.h"
+#include "llsliderctrl.h"
+#include "lltextbox.h"
+#include "lltrans.h"
+#include "llviewerobjectlist.h"
+#include "llviewerwindow.h"
+#include "llvoavatar.h"
+#include "llvoavatarself.h"
+#include "llworld.h"
+#include "pipeline.h"
+
+const F32 REFRESH_INTERVAL = 1.0f;
+const S32 BAR_LEFT_PAD = 2;
+const S32 BAR_RIGHT_PAD = 5;
+const S32 BAR_BOTTOM_PAD = 9;
+
+constexpr auto AvType       {LLPerfStats::ObjType_t::OT_AVATAR};
+constexpr auto AttType      {LLPerfStats::ObjType_t::OT_ATTACHMENT};
+constexpr auto HudType      {LLPerfStats::ObjType_t::OT_HUD};
+
+class LLExceptionsContextMenu : public LLListContextMenu
+{
+public:
+    LLExceptionsContextMenu(LLFloaterPerformance* floater_settings)
+        :   mFloaterPerformance(floater_settings)
+    {}
+protected:
+    LLContextMenu* createMenu()
+    {
+        LLUICtrl::CommitCallbackRegistry::ScopedRegistrar registrar;
+        LLUICtrl::EnableCallbackRegistry::ScopedRegistrar enable_registrar;
+        registrar.add("Settings.SetRendering", boost::bind(&LLFloaterPerformance::onCustomAction, mFloaterPerformance, _2, mUUIDs.front()));
+        enable_registrar.add("Settings.IsSelected", boost::bind(&LLFloaterPerformance::isActionChecked, mFloaterPerformance, _2, mUUIDs.front()));
+        LLContextMenu* menu = createFromFile("menu_avatar_rendering_settings.xml");
+
+        return menu;
+    }
+
+    LLFloaterPerformance* mFloaterPerformance;
+};
+
+LLFloaterPerformance::LLFloaterPerformance(const LLSD& key)
+:   LLFloater(key),
+    mUpdateTimer(new LLTimer()),
+    mNearbyMaxComplexity(0)
+{
+    mContextMenu = new LLExceptionsContextMenu(this);
+}
+
+LLFloaterPerformance::~LLFloaterPerformance()
+{
+    mMaxARTChangedSignal.disconnect();
+    delete mContextMenu;
+    delete mUpdateTimer;
+}
+
+BOOL LLFloaterPerformance::postBuild()
+{
+    mMainPanel = getChild<LLPanel>("panel_performance_main");
+    mNearbyPanel = getChild<LLPanel>("panel_performance_nearby");
+    mComplexityPanel = getChild<LLPanel>("panel_performance_complexity");
+    mSettingsPanel = getChild<LLPanel>("panel_performance_preferences");
+    mHUDsPanel = getChild<LLPanel>("panel_performance_huds");
+    mAutoadjustmentsPanel = getChild<LLPanel>("panel_performance_autoadjustments");
+
+    getChild<LLPanel>("nearby_subpanel")->setMouseDownCallback(boost::bind(&LLFloaterPerformance::showSelectedPanel, this, mNearbyPanel));
+    getChild<LLPanel>("complexity_subpanel")->setMouseDownCallback(boost::bind(&LLFloaterPerformance::showSelectedPanel, this, mComplexityPanel));
+    getChild<LLPanel>("settings_subpanel")->setMouseDownCallback(boost::bind(&LLFloaterPerformance::showSelectedPanel, this, mSettingsPanel));
+    getChild<LLPanel>("huds_subpanel")->setMouseDownCallback(boost::bind(&LLFloaterPerformance::showSelectedPanel, this, mHUDsPanel));
+    getChild<LLPanel>("autoadjustments_subpanel")->setMouseDownCallback(boost::bind(&LLFloaterPerformance::showSelectedPanel, this, mAutoadjustmentsPanel));
+
+    initBackBtn(mNearbyPanel);
+    initBackBtn(mComplexityPanel);
+    initBackBtn(mSettingsPanel);
+    initBackBtn(mHUDsPanel);
+    initBackBtn(mAutoadjustmentsPanel);
+
+    mHUDList = mHUDsPanel->getChild<LLNameListCtrl>("hud_list");
+    mHUDList->setNameListType(LLNameListCtrl::SPECIAL);
+    mHUDList->setHoverIconName("StopReload_Off");
+    mHUDList->setIconClickedCallback(boost::bind(&LLFloaterPerformance::detachItem, this, _1));
+
+    mObjectList = mComplexityPanel->getChild<LLNameListCtrl>("obj_list");
+    mObjectList->setNameListType(LLNameListCtrl::SPECIAL);
+    mObjectList->setHoverIconName("StopReload_Off");
+    mObjectList->setIconClickedCallback(boost::bind(&LLFloaterPerformance::detachItem, this, _1));
+
+    mSettingsPanel->getChild<LLButton>("advanced_btn")->setCommitCallback(boost::bind(&LLFloaterPerformance::onClickAdvanced, this));
+    mSettingsPanel->getChild<LLButton>("defaults_btn")->setCommitCallback(boost::bind(&LLFloaterPerformance::onClickDefaults, this));
+    mSettingsPanel->getChild<LLRadioGroup>("graphics_quality")->setCommitCallback(boost::bind(&LLFloaterPerformance::onChangeQuality, this, _2));
+    mSettingsPanel->getChild<LLCheckBoxCtrl>("advanced_lighting_model")->setMouseDownCallback(boost::bind(&LLFloaterPerformance::onClickAdvancedLighting, this));
+    mSettingsPanel->getChild<LLComboBox>("ShadowDetail")->setMouseDownCallback(boost::bind(&LLFloaterPerformance::onClickShadows, this));
+
+    mNearbyPanel->getChild<LLButton>("exceptions_btn")->setCommitCallback(boost::bind(&LLFloaterPerformance::onClickExceptions, this));
+    mNearbyPanel->getChild<LLCheckBoxCtrl>("hide_avatars")->setCommitCallback(boost::bind(&LLFloaterPerformance::onClickHideAvatars, this));
+    mNearbyPanel->getChild<LLCheckBoxCtrl>("hide_avatars")->set(!LLPipeline::hasRenderTypeControl(LLPipeline::RENDER_TYPE_AVATAR));
+    mNearbyList = mNearbyPanel->getChild<LLNameListCtrl>("nearby_list");
+    mNearbyList->setRightMouseDownCallback(boost::bind(&LLFloaterPerformance::onAvatarListRightClick, this, _1, _2, _3));
+
+    mMaxARTChangedSignal = gSavedSettings.getControl("RenderAvatarMaxART")->getCommitSignal()->connect(boost::bind(&LLFloaterPerformance::updateMaxRenderTime, this));
+    mNearbyPanel->getChild<LLSliderCtrl>("RenderAvatarMaxART")->setCommitCallback(boost::bind(&LLFloaterPerformance::updateMaxRenderTime, this));
+
+    if(!LLPerfStats::tunables.userAutoTuneEnabled)
+    {
+        gSavedSettings.setF32("AutoTuneRenderFarClipTarget", LLPipeline::RenderFarClip);
+    }
+
+    LLStringExplicit fps_limit(llformat("%d", gViewerWindow->getWindow()->getRefreshRate()));
+    mAutoadjustmentsPanel->getChild<LLTextBox>("vsync_desc_limit")->setTextArg("[FPS_LIMIT]", fps_limit);
+    mAutoadjustmentsPanel->getChild<LLTextBox>("display_desc")->setTextArg("[FPS_LIMIT]", fps_limit);
+    mAutoadjustmentsPanel->getChild<LLButton>("defaults_btn")->setCommitCallback(boost::bind(&LLFloaterPerformance::onClickDefaults, this));
+
+    mStartAutotuneBtn = mAutoadjustmentsPanel->getChild<LLButton>("start_autotune");
+    mStopAutotuneBtn = mAutoadjustmentsPanel->getChild<LLButton>("stop_autotune");
+    mStartAutotuneBtn->setCommitCallback(boost::bind(&LLFloaterPerformance::startAutotune, this));
+    mStopAutotuneBtn->setCommitCallback(boost::bind(&LLFloaterPerformance::stopAutotune, this));
+
+    gSavedPerAccountSettings.declareBOOL("HadEnabledAutoFPS", FALSE, "User had enabled AutoFPS at least once", LLControlVariable::PERSIST_ALWAYS);
+
+    return TRUE;
+}
+
+void LLFloaterPerformance::showSelectedPanel(LLPanel* selected_panel)
+{
+    hidePanels();
+    mMainPanel->setVisible(FALSE);
+    selected_panel->setVisible(TRUE);
+
+    if (mHUDsPanel == selected_panel)
+    {
+        populateHUDList();
+    }
+    else if (mNearbyPanel == selected_panel)
+    {
+        populateNearbyList();
+    }
+    else if (mComplexityPanel == selected_panel)
+    {
+        populateObjectList();
+    }
+}
+
+void LLFloaterPerformance::showAutoadjustmentsPanel()
+{
+    showSelectedPanel(mAutoadjustmentsPanel);
+}
+
+void LLFloaterPerformance::draw()
+{
+    enableAutotuneWarning();
+
+    if (mUpdateTimer->hasExpired() && 
+        !LLFloaterReg::instanceVisible("save_pref_preset", PRESETS_GRAPHIC)) // give user a chance to save the graphics settings before updating them
+    {
+        setFPSText();
+        if (mHUDsPanel->getVisible())
+        {
+            populateHUDList();
+        }
+        else if (mNearbyPanel->getVisible())
+        {
+            populateNearbyList();
+            mNearbyPanel->getChild<LLCheckBoxCtrl>("hide_avatars")->set(!LLPipeline::hasRenderTypeControl(LLPipeline::RENDER_TYPE_AVATAR));
+        }
+        else if (mComplexityPanel->getVisible())
+        {
+            populateObjectList();
+        }
+
+        mUpdateTimer->setTimerExpirySec(REFRESH_INTERVAL);
+    }
+    updateAutotuneCtrls(LLPerfStats::tunables.userAutoTuneEnabled);
+
+    LLFloater::draw();
+}
+
+void LLFloaterPerformance::showMainPanel()
+{
+    hidePanels();
+    mMainPanel->setVisible(TRUE);
+}
+
+void LLFloaterPerformance::hidePanels()
+{
+    mNearbyPanel->setVisible(FALSE);
+    mComplexityPanel->setVisible(FALSE);
+    mHUDsPanel->setVisible(FALSE);
+    mSettingsPanel->setVisible(FALSE);
+    mAutoadjustmentsPanel->setVisible(FALSE);
+}
+
+void LLFloaterPerformance::initBackBtn(LLPanel* panel)
+{
+    panel->getChild<LLButton>("back_btn")->setCommitCallback(boost::bind(&LLFloaterPerformance::showMainPanel, this));
+
+    panel->getChild<LLTextBox>("back_lbl")->setShowCursorHand(false);
+    panel->getChild<LLTextBox>("back_lbl")->setSoundFlags(LLView::MOUSE_UP);
+    panel->getChild<LLTextBox>("back_lbl")->setClickedCallback(boost::bind(&LLFloaterPerformance::showMainPanel, this));
+}
+
+void LLFloaterPerformance::populateHUDList()
+{
+    S32 prev_pos = mHUDList->getScrollPos();
+    LLUUID prev_selected_id = mHUDList->getSelectedSpecialId();
+    mHUDList->clearRows();
+    mHUDList->updateColumns(true);
+
+    hud_complexity_list_t complexity_list = LLHUDRenderNotifier::getInstance()->getHUDComplexityList();
+
+    hud_complexity_list_t::iterator iter = complexity_list.begin();
+    hud_complexity_list_t::iterator end = complexity_list.end();
+
+    auto huds_max_render_time_raw = LLPerfStats::StatsRecorder::getMax(HudType, LLPerfStats::StatType_t::RENDER_GEOMETRY);
+    for (iter = complexity_list.begin(); iter != end; ++iter)
+    {
+        LLHUDComplexity hud_object_complexity = *iter;
+
+        auto hud_render_time_raw = LLPerfStats::StatsRecorder::get(HudType, hud_object_complexity.objectId, LLPerfStats::StatType_t::RENDER_GEOMETRY);
+
+        LLSD item;
+        item["special_id"] = hud_object_complexity.objectId;
+        item["target"] = LLNameListCtrl::SPECIAL;
+        LLSD& row = item["columns"];
+        row[0]["column"] = "complex_visual";
+        row[0]["type"] = "bar";
+        LLSD& value = row[0]["value"];
+        value["ratio"] = (F32)hud_render_time_raw / huds_max_render_time_raw;
+        value["bottom"] = BAR_BOTTOM_PAD;
+        value["left_pad"] = BAR_LEFT_PAD;
+        value["right_pad"] = BAR_RIGHT_PAD;
+
+        row[1]["column"] = "complex_value";
+        row[1]["type"] = "text";
+        row[1]["value"] = llformat( "%.f", llmax(LLPerfStats::raw_to_us(hud_render_time_raw), (double)1));
+        row[1]["font"]["name"] = "SANSSERIF";
+ 
+        row[2]["column"] = "name";
+        row[2]["type"] = "text";
+        row[2]["value"] = hud_object_complexity.objectName;
+        row[2]["font"]["name"] = "SANSSERIF";
+
+        LLScrollListItem* obj = mHUDList->addElement(item);
+        if (obj)
+        {
+            LLScrollListText* value_text = dynamic_cast<LLScrollListText*>(obj->getColumn(1));
+            if (value_text)
+            {
+                value_text->setAlignment(LLFontGL::HCENTER);
+            }
+        }
+    }
+    mHUDList->sortByColumnIndex(1, FALSE);
+    mHUDList->setScrollPos(prev_pos);
+    mHUDList->selectItemBySpecialId(prev_selected_id);
+}
+
+void LLFloaterPerformance::populateObjectList()
+{
+    S32 prev_pos = mObjectList->getScrollPos();
+    LLUUID prev_selected_id = mObjectList->getSelectedSpecialId();
+    mObjectList->clearRows();
+    mObjectList->updateColumns(true);
+
+    object_complexity_list_t complexity_list = LLAvatarRenderNotifier::getInstance()->getObjectComplexityList();
+
+    object_complexity_list_t::iterator iter = complexity_list.begin();
+    object_complexity_list_t::iterator end = complexity_list.end();
+
+    // for consistency we lock the buffer while we build the list. In theory this is uncontended as the buffer should only toggle on end of frame
+    {
+        std::lock_guard<std::mutex> guard{ LLPerfStats::bufferToggleLock };
+        auto att_max_render_time_raw = LLPerfStats::StatsRecorder::getMax(AttType, LLPerfStats::StatType_t::RENDER_COMBINED);
+
+        for (iter = complexity_list.begin(); iter != end; ++iter)
+        {
+            LLObjectComplexity object_complexity = *iter;
+
+            auto attach_render_time_raw = LLPerfStats::StatsRecorder::get(AttType, object_complexity.objectId, LLPerfStats::StatType_t::RENDER_COMBINED);
+            LLSD item;
+            item["special_id"] = object_complexity.objectId;
+            item["target"] = LLNameListCtrl::SPECIAL;
+            LLSD& row = item["columns"];
+            row[0]["column"] = "complex_visual";
+            row[0]["type"] = "bar";
+            LLSD& value = row[0]["value"];
+            value["ratio"] = ((F32)attach_render_time_raw) / att_max_render_time_raw;
+            value["bottom"] = BAR_BOTTOM_PAD;
+            value["left_pad"] = BAR_LEFT_PAD;
+            value["right_pad"] = BAR_RIGHT_PAD;
+
+            row[1]["column"] = "complex_value";
+            row[1]["type"] = "text";
+            row[1]["value"] = llformat("%.f", llmax(LLPerfStats::raw_to_us(attach_render_time_raw), (double)1));
+            row[1]["font"]["name"] = "SANSSERIF";
+
+            row[2]["column"] = "name";
+            row[2]["type"] = "text";
+            row[2]["value"] = object_complexity.objectName;
+            row[2]["font"]["name"] = "SANSSERIF";
+
+            LLScrollListItem* obj = mObjectList->addElement(item);
+            if (obj)
+            {
+                LLScrollListText* value_text = dynamic_cast<LLScrollListText*>(obj->getColumn(1));
+                if (value_text)
+                {
+                    value_text->setAlignment(LLFontGL::HCENTER);
+                }
+            }
+        }
+    }
+    mObjectList->sortByColumnIndex(1, FALSE);
+    mObjectList->setScrollPos(prev_pos);
+    mObjectList->selectItemBySpecialId(prev_selected_id);
+}
+
+void LLFloaterPerformance::populateNearbyList()
+{
+    static LLCachedControl<bool> showTunedART(gSavedSettings, "ShowTunedART");
+    S32 prev_pos = mNearbyList->getScrollPos();
+    LLUUID prev_selected_id = mNearbyList->getStringUUIDSelectedItem();
+    mNearbyList->clearRows();
+    mNearbyList->updateColumns(true);
+
+    static LLCachedControl<U32> max_render_cost(gSavedSettings, "RenderAvatarMaxComplexity", 0);
+    std::vector<LLCharacter*> valid_nearby_avs;
+    mNearbyMaxComplexity = LLWorld::getInstance()->getNearbyAvatarsAndCompl(valid_nearby_avs);
+
+    std::vector<LLCharacter*>::iterator char_iter = valid_nearby_avs.begin();
+
+    LLPerfStats::bufferToggleLock.lock();
+    auto av_render_max_raw = LLPerfStats::StatsRecorder::getMax(AvType, LLPerfStats::StatType_t::RENDER_COMBINED);
+    LLPerfStats::bufferToggleLock.unlock();
+
+    while (char_iter != valid_nearby_avs.end())
+    {
+        LLVOAvatar* avatar = dynamic_cast<LLVOAvatar*>(*char_iter);
+        if (avatar && (LLVOAvatar::AOA_INVISIBLE != avatar->getOverallAppearance()))
+        {
+            LLPerfStats::bufferToggleLock.lock();
+            auto render_av_raw  = LLPerfStats::StatsRecorder::get(AvType, avatar->getID(),LLPerfStats::StatType_t::RENDER_COMBINED);
+            LLPerfStats::bufferToggleLock.unlock();
+
+            auto is_slow = avatar->isTooSlow();
+            LLSD item;
+            item["id"] = avatar->getID();
+            LLSD& row = item["columns"];
+            row[0]["column"] = "complex_visual";
+            row[0]["type"] = "bar";
+            LLSD& value = row[0]["value"];
+            // The ratio used in the bar is the current cost, as soon as we take action this changes so we keep the 
+            // pre-tune value for the numerical column and sorting.
+            value["ratio"] = (double)render_av_raw / av_render_max_raw;
+            value["bottom"] = BAR_BOTTOM_PAD;
+            value["left_pad"] = BAR_LEFT_PAD;
+            value["right_pad"] = BAR_RIGHT_PAD;
+
+            row[1]["column"] = "complex_value";
+            row[1]["type"] = "text";
+            if (is_slow && !showTunedART)
+            {
+                row[1]["value"] = llformat( "%.f", LLPerfStats::raw_to_us( avatar->getLastART() ) );
+            }
+            else
+            {
+                row[1]["value"] = llformat( "%.f", LLPerfStats::raw_to_us( render_av_raw ) );
+            }
+            row[1]["font"]["name"] = "SANSSERIF";
+
+            row[2]["column"] = "name";
+            row[2]["type"] = "text";
+            row[2]["value"] = avatar->getFullname();
+            row[2]["font"]["name"] = "SANSSERIF";
+
+            LLScrollListItem* av_item = mNearbyList->addElement(item);
+            if(av_item)
+            {
+                LLScrollListText* value_text = dynamic_cast<LLScrollListText*>(av_item->getColumn(1));
+                if (value_text)
+                {
+                    value_text->setAlignment(LLFontGL::HCENTER);
+                }
+                LLScrollListText* name_text = dynamic_cast<LLScrollListText*>(av_item->getColumn(2));
+                if (name_text)
+                {
+                    if (avatar->isSelf())
+                    {
+                        name_text->setColor(LLUIColorTable::instance().getColor("DrYellow"));
+                    }
+                    else
+                    {
+                        std::string color = "white";
+                        if (is_slow || LLVOAvatar::AOA_JELLYDOLL == avatar->getOverallAppearance())
+                        {
+                            color = "LabelDisabledColor";
+                            LLScrollListBar* bar = dynamic_cast<LLScrollListBar*>(av_item->getColumn(0));
+                            if (bar)
+                            {
+                                bar->setColor(LLUIColorTable::instance().getColor(color));
+                            }
+                        }
+                        else if (LLVOAvatar::AOA_NORMAL == avatar->getOverallAppearance())
+                        {
+                            color = LLAvatarActions::isFriend(avatar->getID()) ? "ConversationFriendColor" : "white";
+                        }
+                        name_text->setColor(LLUIColorTable::instance().getColor(color));
+                    }
+                }
+            }
+        }
+        char_iter++;
+    }
+    mNearbyList->sortByColumnIndex(1, FALSE);
+    mNearbyList->setScrollPos(prev_pos);
+    mNearbyList->selectByID(prev_selected_id);
+}
+
+void LLFloaterPerformance::setFPSText()
+{
+    const S32 NUM_PERIODS = 50;
+    S32 current_fps = (S32)llround(LLTrace::get_frame_recording().getPeriodMedianPerSec(LLStatViewer::FPS, NUM_PERIODS));
+    getChild<LLTextBox>("fps_value")->setValue(current_fps);
+
+    std::string fps_text = getString("fps_text");
+    static LLCachedControl<bool> vsync_enabled(gSavedSettings, "RenderVSyncEnable", true);
+    S32 refresh_rate = gViewerWindow->getWindow()->getRefreshRate();
+    if (vsync_enabled && (refresh_rate > 0) && (current_fps >= refresh_rate))
+    {
+        fps_text += getString("max_text");
+    }
+    getChild<LLTextBox>("fps_lbl")->setValue(fps_text);
+}
+
+void LLFloaterPerformance::detachItem(const LLUUID& item_id)
+{
+    LLAppearanceMgr::instance().removeItemFromAvatar(item_id);
+}
+
+void LLFloaterPerformance::onClickAdvanced()
+{
+    LLFloaterPreference* instance = LLFloaterReg::getTypedInstance<LLFloaterPreference>("preferences");
+    if (instance)
+    {
+        instance->saveSettings();
+    }
+    LLFloaterReg::showInstance("prefs_graphics_advanced");
+}
+
+void LLFloaterPerformance::onClickDefaults()
+{
+    LLFloaterPreference* instance = LLFloaterReg::getTypedInstance<LLFloaterPreference>("preferences");
+    if (instance)
+    {
+        instance->setRecommendedSettings();
+    }
+}
+
+void LLFloaterPerformance::onChangeQuality(const LLSD& data)
+{
+    LLFloaterPreference* instance = LLFloaterReg::getTypedInstance<LLFloaterPreference>("preferences");
+    if (instance)
+    {
+        instance->onChangeQuality(data);
+    }
+}
+
+void LLFloaterPerformance::onClickHideAvatars()
+{
+    LLPipeline::toggleRenderTypeControl(LLPipeline::RENDER_TYPE_AVATAR);
+}
+
+void LLFloaterPerformance::onClickExceptions()
+{
+    LLFloaterReg::showInstance("avatar_render_settings");
+}
+
+void LLFloaterPerformance::updateMaxRenderTime()
+{
+    LLAvatarComplexityControls::updateMaxRenderTime(
+        mNearbyPanel->getChild<LLSliderCtrl>("RenderAvatarMaxART"),
+        mNearbyPanel->getChild<LLTextBox>("RenderAvatarMaxARTText"), 
+        true);
+}
+
+static LLVOAvatar* find_avatar(const LLUUID& id)
+{
+    LLViewerObject *obj = gObjectList.findObject(id);
+    while (obj && obj->isAttachment())
+    {
+        obj = (LLViewerObject *)obj->getParent();
+    }
+
+    if (obj && obj->isAvatar())
+    {
+        return (LLVOAvatar*)obj;
+    }
+    else
+    {
+        return NULL;
+    }
+}
+
+void LLFloaterPerformance::onCustomAction(const LLSD& userdata, const LLUUID& av_id)
+{
+    const std::string command_name = userdata.asString();
+
+    S32 new_setting = 0;
+    if ("default" == command_name)
+    {
+        new_setting = S32(LLVOAvatar::AV_RENDER_NORMALLY);
+    }
+    else if ("never" == command_name)
+    {
+        new_setting = S32(LLVOAvatar::AV_DO_NOT_RENDER);
+    }
+    else if ("always" == command_name)
+    {
+        new_setting = S32(LLVOAvatar::AV_ALWAYS_RENDER);
+    }
+
+    LLVOAvatar *avatarp = find_avatar(av_id);
+    if (avatarp)
+    {
+        avatarp->setVisualMuteSettings(LLVOAvatar::VisualMuteSettings(new_setting));
+    }
+    else
+    {
+        LLRenderMuteList::getInstance()->saveVisualMuteSetting(av_id, new_setting);
+    }
+}
+
+
+bool LLFloaterPerformance::isActionChecked(const LLSD& userdata, const LLUUID& av_id)
+{
+    const std::string command_name = userdata.asString();
+
+    S32 visual_setting = LLRenderMuteList::getInstance()->getSavedVisualMuteSetting(av_id);
+    if ("default" == command_name)
+    {
+        return (visual_setting == S32(LLVOAvatar::AV_RENDER_NORMALLY));
+    }
+    else if ("non_default" == command_name)
+    {
+        return (visual_setting != S32(LLVOAvatar::AV_RENDER_NORMALLY));
+    }
+    else if ("never" == command_name)
+    {
+        return (visual_setting == S32(LLVOAvatar::AV_DO_NOT_RENDER));
+    }
+    else if ("always" == command_name)
+    {
+        return (visual_setting == S32(LLVOAvatar::AV_ALWAYS_RENDER));
+    }
+    return false;
+}
+
+void LLFloaterPerformance::onAvatarListRightClick(LLUICtrl* ctrl, S32 x, S32 y)
+{
+    LLNameListCtrl* list = dynamic_cast<LLNameListCtrl*>(ctrl);
+    if (!list) return;
+    list->selectItemAt(x, y, MASK_NONE);
+    uuid_vec_t selected_uuids;
+
+    if((list->getCurrentID().notNull()) && (list->getCurrentID() != gAgentID))
+    {
+        selected_uuids.push_back(list->getCurrentID());
+        mContextMenu->show(ctrl, selected_uuids, x, y);
+    }
+}
+
+const U32 RENDER_QUALITY_LEVEL = 3;
+void LLFloaterPerformance::changeQualityLevel(const std::string& notif)
+{
+    LLNotificationsUtil::add(notif, LLSD(), LLSD(),
+        [](const LLSD&notif, const LLSD&resp)
+    {
+        S32 opt = LLNotificationsUtil::getSelectedOption(notif, resp);
+        if (opt == 0)
+        {
+            LLFloaterPreference* instance = LLFloaterReg::getTypedInstance<LLFloaterPreference>("preferences");
+            if (instance)
+            {
+                gSavedSettings.setU32("RenderQualityPerformance", RENDER_QUALITY_LEVEL);
+                instance->onChangeQuality(LLSD((S32)RENDER_QUALITY_LEVEL));
+            }
+        }
+    });
+}
+
+bool is_ALM_available()
+{
+    bool bumpshiny = LLCubeMap::sUseCubeMaps && LLFeatureManager::getInstance()->isFeatureAvailable("RenderObjectBump") && gSavedSettings.getBOOL("RenderObjectBump");
+    bool shaders = gSavedSettings.getBOOL("WindLightUseAtmosShaders");
+    
+    return LLFeatureManager::getInstance()->isFeatureAvailable("RenderDeferred") &&
+        bumpshiny &&
+        shaders;
+}
+
+void LLFloaterPerformance::onClickAdvancedLighting()
+{
+    if (!is_ALM_available())
+    {
+        changeQualityLevel("AdvancedLightingConfirm");
+    }
+}
+
+void LLFloaterPerformance::onClickShadows()
+{
+    if (!is_ALM_available() || !gSavedSettings.getBOOL("RenderDeferred"))
+    {
+        changeQualityLevel("ShadowsConfirm");
+    }
+
+}
+
+void LLFloaterPerformance::startAutotune()
+{
+    LLPerfStats::tunables.userAutoTuneEnabled = true;
+}
+
+void LLFloaterPerformance::stopAutotune()
+{
+    LLPerfStats::tunables.userAutoTuneEnabled = false;
+}
+
+void LLFloaterPerformance::updateAutotuneCtrls(bool autotune_enabled)
+{
+    static LLCachedControl<bool> auto_tune_locked(gSavedSettings, "AutoTuneLock");
+    mStartAutotuneBtn->setEnabled(!autotune_enabled && !auto_tune_locked);
+    mStopAutotuneBtn->setEnabled(autotune_enabled && !auto_tune_locked);
+    getChild<LLCheckBoxCtrl>("AutoTuneContinuous")->setEnabled(!autotune_enabled || (autotune_enabled && auto_tune_locked));
+
+    getChild<LLTextBox>("wip_desc")->setVisible(autotune_enabled && !auto_tune_locked);
+    getChild<LLTextBox>("display_desc")->setVisible(LLPerfStats::tunables.vsyncEnabled);
+}
+
+void LLFloaterPerformance::enableAutotuneWarning()
+{
+    if (!gSavedPerAccountSettings.getBOOL("HadEnabledAutoFPS") && LLPerfStats::tunables.userAutoTuneEnabled)
+    {
+        gSavedPerAccountSettings.setBOOL("HadEnabledAutoFPS", TRUE);
+
+        LLNotificationsUtil::add("EnableAutoFPSWarning", LLSD(), LLSD(),
+            [](const LLSD& notif, const LLSD& resp)
+            {
+                S32 opt = LLNotificationsUtil::getSelectedOption(notif, resp);
+                if (opt == 0)
+                { // offer user to save current graphics settings as a preset
+                    LLFloaterReg::showInstance("save_pref_preset", PRESETS_GRAPHIC);
+                }
+            });
+    }
+}
+// EOF
diff --git a/indra/newview/llfloaterperformance.h b/indra/newview/llfloaterperformance.h
new file mode 100644
index 0000000000..00f904f6d6
--- /dev/null
+++ b/indra/newview/llfloaterperformance.h
@@ -0,0 +1,102 @@
+/** 
+ * @file llfloaterperformance.h
+ *
+ * $LicenseInfo:firstyear=2021&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2021, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLFLOATERPERFORMANCE_H
+#define LL_LLFLOATERPERFORMANCE_H
+
+#include "llfloater.h"
+#include "lllistcontextmenu.h"
+
+class LLCharacter;
+class LLNameListCtrl;
+
+class LLFloaterPerformance : public LLFloater
+{
+public:
+    LLFloaterPerformance(const LLSD& key);
+    virtual ~LLFloaterPerformance();
+
+    /*virtual*/ BOOL postBuild();
+    /*virtual*/ void draw();
+
+    void showSelectedPanel(LLPanel* selected_panel);
+    void showMainPanel();
+    void hidePanels();
+    void showAutoadjustmentsPanel();
+
+    void detachItem(const LLUUID& item_id);
+
+    void onAvatarListRightClick(LLUICtrl* ctrl, S32 x, S32 y);
+
+    void onCustomAction (const LLSD& userdata, const LLUUID& av_id);
+    bool isActionChecked(const LLSD& userdata, const LLUUID& av_id);
+
+private:
+    void initBackBtn(LLPanel* panel);
+    void populateHUDList();
+    void populateObjectList();
+    void populateNearbyList();
+    void setFPSText();
+
+    void onClickAdvanced();
+    void onClickDefaults();
+    void onChangeQuality(const LLSD& data);
+    void onClickHideAvatars();
+    void onClickExceptions();
+    void onClickShadows();
+    void onClickAdvancedLighting();
+
+    void startAutotune();
+    void stopAutotune();
+    void updateAutotuneCtrls(bool autotune_enabled);
+    void enableAutotuneWarning();
+
+    void updateMaxRenderTime();
+
+    static void changeQualityLevel(const std::string& notif);
+
+    LLPanel* mMainPanel;
+    LLPanel* mNearbyPanel;
+    LLPanel* mComplexityPanel;
+    LLPanel* mHUDsPanel;
+    LLPanel* mSettingsPanel;
+    LLPanel* mAutoadjustmentsPanel;
+    LLNameListCtrl* mHUDList;
+    LLNameListCtrl* mObjectList;
+    LLNameListCtrl* mNearbyList;
+
+    LLButton* mStartAutotuneBtn;
+    LLButton* mStopAutotuneBtn;
+
+    LLListContextMenu* mContextMenu;
+
+    LLTimer* mUpdateTimer;
+
+    S32 mNearbyMaxComplexity;
+
+    boost::signals2::connection	mMaxARTChangedSignal;
+};
+
+#endif // LL_LLFLOATERPERFORMANCE_H
diff --git a/indra/newview/llfloaterpreference.cpp b/indra/newview/llfloaterpreference.cpp
index 7487c1c9f9..d4e40ff103 100644
--- a/indra/newview/llfloaterpreference.cpp
+++ b/indra/newview/llfloaterpreference.cpp
@@ -50,6 +50,8 @@
 #include "llfloaterreg.h"
 #include "llfloaterabout.h"
 #include "llfavoritesbar.h"
+#include "llfloaterpreferencesgraphicsadvanced.h"
+#include "llfloaterperformance.h"
 #include "llfloatersidepanelcontainer.h"
 #include "llfloaterimsession.h"
 #include "llkeyboard.h"
@@ -74,7 +76,6 @@
 #include "llviewereventrecorder.h"
 #include "llviewermessage.h"
 #include "llviewerwindow.h"
-#include "llviewershadermgr.h"
 #include "llviewerthrottle.h"
 #include "llvoavatarself.h"
 #include "llvotree.h"
@@ -97,11 +98,9 @@
 #include "lltextbox.h"
 #include "llui.h"
 #include "llviewerobjectlist.h"
-#include "llvoavatar.h"
 #include "llvovolume.h"
 #include "llwindow.h"
 #include "llworld.h"
-#include "pipeline.h"
 #include "lluictrlfactory.h"
 #include "llviewermedia.h"
 #include "llpluginclassmedia.h"
@@ -114,10 +113,9 @@
 #include "llpresetsmanager.h"
 #include "llviewercontrol.h"
 #include "llpresetsmanager.h"
-#include "llfeaturemanager.h"
-#include "llviewertexturelist.h"
 
 #include "llsearchableui.h"
+#include "llperfstats.h"
 
 const F32 BANDWIDTH_UPDATER_TIMEOUT = 0.5f;
 char const* const VISIBILITY_DEFAULT = "default";
@@ -289,6 +287,7 @@ LLFloaterPreference::LLFloaterPreference(const LLSD& key)
 	mCommitCallbackRegistrar.add("Pref.ClickDisablePopup",		boost::bind(&LLFloaterPreference::onClickDisablePopup, this));	
 	mCommitCallbackRegistrar.add("Pref.LogPath",				boost::bind(&LLFloaterPreference::onClickLogPath, this));
 	mCommitCallbackRegistrar.add("Pref.RenderExceptions",       boost::bind(&LLFloaterPreference::onClickRenderExceptions, this));
+	mCommitCallbackRegistrar.add("Pref.AutoAdjustments",         boost::bind(&LLFloaterPreference::onClickAutoAdjustments, this));
 	mCommitCallbackRegistrar.add("Pref.HardwareDefaults",		boost::bind(&LLFloaterPreference::setHardwareDefaults, this));
 	mCommitCallbackRegistrar.add("Pref.AvatarImpostorsEnable",	boost::bind(&LLFloaterPreference::onAvatarImpostorsEnable, this));
 	mCommitCallbackRegistrar.add("Pref.UpdateIndirectMaxComplexity",	boost::bind(&LLFloaterPreference::updateMaxComplexity, this));
@@ -317,9 +316,12 @@ LLFloaterPreference::LLFloaterPreference(const LLSD& key)
 	gSavedSettings.getControl("UseDisplayNames")->getCommitSignal()->connect(boost::bind(&handleDisplayNamesOptionChanged,  _2));
 
 	gSavedSettings.getControl("AppearanceCameraMovement")->getCommitSignal()->connect(boost::bind(&handleAppearanceCameraMovementChanged,  _2));
+    gSavedSettings.getControl("WindLightUseAtmosShaders")->getCommitSignal()->connect(boost::bind(&LLFloaterPreference::onAtmosShaderChange, this));
 
 	LLAvatarPropertiesProcessor::getInstance()->addObserver( gAgent.getID(), this );
 
+    mComplexityChangedSignal = gSavedSettings.getControl("RenderAvatarMaxComplexity")->getCommitSignal()->connect(boost::bind(&LLFloaterPreference::updateComplexityText, this));
+
 	mCommitCallbackRegistrar.add("Pref.ClearLog",				boost::bind(&LLConversationLog::onClearLog, &LLConversationLog::instance()));
 	mCommitCallbackRegistrar.add("Pref.DeleteTranscripts",      boost::bind(&LLFloaterPreference::onDeleteTranscripts, this));
 	mCommitCallbackRegistrar.add("UpdateFilter", boost::bind(&LLFloaterPreference::onUpdateFilterTerm, this, false)); // <FS:ND/> Hook up for filtering
@@ -487,6 +489,7 @@ void LLFloaterPreference::onDoNotDisturbResponseChanged()
 LLFloaterPreference::~LLFloaterPreference()
 {
 	LLConversationLog::instance().removeObserver(this);
+    mComplexityChangedSignal.disconnect();
 }
 
 void LLFloaterPreference::draw()
@@ -730,13 +733,15 @@ void LLFloaterPreference::onOpen(const LLSD& key)
 	LLButton* save_btn = findChild<LLButton>("PrefSaveButton");
 	LLButton* delete_btn = findChild<LLButton>("PrefDeleteButton");
 	LLButton* exceptions_btn = findChild<LLButton>("RenderExceptionsButton");
+    LLButton* auto_adjustments_btn = findChild<LLButton>("AutoAdjustmentsButton");
 
-	if (load_btn && save_btn && delete_btn && exceptions_btn)
+	if (load_btn && save_btn && delete_btn && exceptions_btn && auto_adjustments_btn)
 	{
 		load_btn->setEnabled(started);
 		save_btn->setEnabled(started);
 		delete_btn->setEnabled(started);
 		exceptions_btn->setEnabled(started);
+        auto_adjustments_btn->setEnabled(started);
 	}
 
     collectSearchableItems();
@@ -752,33 +757,6 @@ void LLFloaterPreference::onRenderOptionEnable()
 	refreshEnabledGraphics();
 }
 
-void LLFloaterPreferenceGraphicsAdvanced::onRenderOptionEnable()
-{
-	LLFloaterPreference* instance = LLFloaterReg::findTypedInstance<LLFloaterPreference>("preferences");
-	if (instance)
-	{
-		instance->refresh();
-	}
-
-	refreshEnabledGraphics();
-}
-
-void LLFloaterPreferenceGraphicsAdvanced::onAdvancedAtmosphericsEnable()
-{
-	LLFloaterPreference* instance = LLFloaterReg::findTypedInstance<LLFloaterPreference>("preferences");
-	if (instance)
-	{
-		instance->refresh();
-	}
-
-	refreshEnabledGraphics();
-}
-
-void LLFloaterPreferenceGraphicsAdvanced::refreshEnabledGraphics()
-{
-	refreshEnabledState();
-}
-
 void LLFloaterPreference::onAvatarImpostorsEnable()
 {
 	refreshEnabledGraphics();
@@ -812,6 +790,13 @@ void LLFloaterPreference::setHardwareDefaults()
 		saveGraphicsPreset(preset_graphic_active);
 		saveSettings(); // save here to be able to return to the previous preset by Cancel
 	}
+    setRecommendedSettings();
+}
+
+void LLFloaterPreference::setRecommendedSettings()
+{
+    resetAutotuneSettings();
+    gSavedSettings.getControl("RenderVSyncEnable")->resetToDefault(true);
 
 	LLFeatureManager::getInstance()->applyRecommendedSettings();
 
@@ -836,6 +821,28 @@ void LLFloaterPreference::setHardwareDefaults()
 	}
 }
 
+void LLFloaterPreference::resetAutotuneSettings()
+{
+    gSavedSettings.setBOOL("AutoTuneFPS", FALSE);
+
+    const std::string autotune_settings[] = {
+        "AutoTuneLock",
+        "KeepAutoTuneLock",
+        "TargetFPS",
+        "TuningFPSStrategy",
+        "AutoTuneImpostorByDistEnabled",
+        "AutoTuneImpostorFarAwayDistance" ,
+        "AutoTuneRenderFarClipMin",
+        "AutoTuneRenderFarClipTarget",
+        "RenderAvatarMaxART"
+    };
+
+    for (auto it : autotune_settings)
+    {
+        gSavedSettings.getControl(it)->resetToDefault(true);
+    }
+}
+
 void LLFloaterPreference::getControlNames(std::vector<std::string>& names)
 {
 	LLView* view = findChild<LLView>("display");
@@ -1194,62 +1201,6 @@ void LLFloaterPreference::refreshEnabledState()
 	getChildView("block_list")->setEnabled(LLLoginInstance::getInstance()->authSuccess());
 }
 
-void LLFloaterPreferenceGraphicsAdvanced::refreshEnabledState()
-{
-    // WindLight
-    LLSliderCtrl* sky = getChild<LLSliderCtrl>("SkyMeshDetail");
-    LLTextBox* sky_text = getChild<LLTextBox>("SkyMeshDetailText");
-    sky->setEnabled(TRUE);
-    sky_text->setEnabled(TRUE);
-
-	LLCheckBoxCtrl* ctrl_ssao = getChild<LLCheckBoxCtrl>("UseSSAO");
-	LLCheckBoxCtrl* ctrl_dof = getChild<LLCheckBoxCtrl>("UseDoF");
-	LLComboBox* ctrl_shadow = getChild<LLComboBox>("ShadowDetail");
-	LLTextBox* shadow_text = getChild<LLTextBox>("RenderShadowDetailText");
-
-	BOOL enabled = LLFeatureManager::getInstance()->isFeatureAvailable("RenderDeferredSSAO");
-	
-	ctrl_ssao->setEnabled(enabled);
-	ctrl_dof->setEnabled(enabled);
-
-	enabled = enabled && LLFeatureManager::getInstance()->isFeatureAvailable("RenderShadowDetail");
-
-	ctrl_shadow->setEnabled(enabled);
-	shadow_text->setEnabled(enabled);
-
-    if (!LLFeatureManager::instance().isFeatureAvailable("RenderFSAASamples"))
-    {
-        getChildView("fsaa")->setEnabled(FALSE);
-    }
-
-    enabled = false;
-    if (!LLFeatureManager::instance().isFeatureAvailable("RenderReflectionsEnabled"))
-    {
-        getChildView("ReflectionsEnabled")->setEnabled(FALSE);
-    }
-    else 
-    {
-        enabled = gSavedSettings.getBOOL("RenderReflectionsEnabled");
-    }
-
-    getChildView("ReflectionDetail")->setEnabled(enabled);
-    getChildView("ReflectionDetailText")->setEnabled(enabled);
-    getChildView("ScreenSpaceReflections")->setEnabled(enabled);
-
-	// Hardware settings
-	
-	if (!LLFeatureManager::getInstance()->isFeatureAvailable("RenderCompressTextures"))
-	{
-		getChildView("texture compression")->setEnabled(FALSE);
-	}
-
-	getChildView("antialiasing restart")->setVisible(!LLFeatureManager::getInstance()->isFeatureAvailable("RenderDeferred"));
-
-	// now turn off any features that are unavailable
-	disableUnavailableSettings();
-}
-
-// static
 void LLAvatarComplexityControls::setIndirectControls()
 {
 	/*
@@ -1291,63 +1242,6 @@ void LLAvatarComplexityControls::setIndirectMaxArc()
 	gSavedSettings.setU32("IndirectMaxComplexity", indirect_max_arc);
 }
 
-void LLFloaterPreferenceGraphicsAdvanced::disableUnavailableSettings()
-{	
-	LLComboBox* ctrl_shadows = getChild<LLComboBox>("ShadowDetail");
-	LLTextBox* shadows_text = getChild<LLTextBox>("RenderShadowDetailText");
-	LLCheckBoxCtrl* ctrl_ssao = getChild<LLCheckBoxCtrl>("UseSSAO");
-	LLCheckBoxCtrl* ctrl_dof = getChild<LLCheckBoxCtrl>("UseDoF");
-	LLSliderCtrl* sky = getChild<LLSliderCtrl>("SkyMeshDetail");
-	LLTextBox* sky_text = getChild<LLTextBox>("SkyMeshDetailText");
-
-	// disabled windlight
-	if (!LLFeatureManager::getInstance()->isFeatureAvailable("WindLightUseAtmosShaders"))
-	{
-		sky->setEnabled(FALSE);
-		sky_text->setEnabled(FALSE);
-
-		//deferred needs windlight, disable deferred
-		ctrl_shadows->setEnabled(FALSE);
-		ctrl_shadows->setValue(0);
-		shadows_text->setEnabled(FALSE);
-		
-		ctrl_ssao->setEnabled(FALSE);
-		ctrl_ssao->setValue(FALSE);
-
-		ctrl_dof->setEnabled(FALSE);
-		ctrl_dof->setValue(FALSE);
-	}
-
-	// disabled deferred
-	if (!LLFeatureManager::getInstance()->isFeatureAvailable("RenderDeferred"))
-	{
-		ctrl_shadows->setEnabled(FALSE);
-		ctrl_shadows->setValue(0);
-		shadows_text->setEnabled(FALSE);
-		
-		ctrl_ssao->setEnabled(FALSE);
-		ctrl_ssao->setValue(FALSE);
-
-		ctrl_dof->setEnabled(FALSE);
-		ctrl_dof->setValue(FALSE);
-	}
-	
-    // disabled deferred SSAO
-	if (!LLFeatureManager::getInstance()->isFeatureAvailable("RenderDeferredSSAO"))
-	{
-		ctrl_ssao->setEnabled(FALSE);   
-		ctrl_ssao->setValue(FALSE);
-	}
-	
-	// disabled deferred shadows
-    if (!LLFeatureManager::getInstance()->isFeatureAvailable("RenderShadowDetail"))
-    {
-        ctrl_shadows->setEnabled(FALSE);
-        ctrl_shadows->setValue(0);
-        shadows_text->setEnabled(FALSE);
-    }
-}
-
 void LLFloaterPreference::refresh()
 {
 	LLPanel::refresh();
@@ -1363,32 +1257,6 @@ void LLFloaterPreference::refresh()
     updateClickActionViews();
 }
 
-void LLFloaterPreferenceGraphicsAdvanced::refresh()
-{
-	getChild<LLUICtrl>("fsaa")->setValue((LLSD::Integer)  gSavedSettings.getU32("RenderFSAASamples"));
-
-	// sliders and their text boxes
-	//	mPostProcess = gSavedSettings.getS32("RenderGlowResolutionPow");
-	// slider text boxes
-	updateSliderText(getChild<LLSliderCtrl>("ObjectMeshDetail",		true), getChild<LLTextBox>("ObjectMeshDetailText",		true));
-	updateSliderText(getChild<LLSliderCtrl>("FlexibleMeshDetail",	true), getChild<LLTextBox>("FlexibleMeshDetailText",	true));
-	updateSliderText(getChild<LLSliderCtrl>("TreeMeshDetail",		true), getChild<LLTextBox>("TreeMeshDetailText",		true));
-	updateSliderText(getChild<LLSliderCtrl>("AvatarMeshDetail",		true), getChild<LLTextBox>("AvatarMeshDetailText",		true));
-	updateSliderText(getChild<LLSliderCtrl>("AvatarPhysicsDetail",	true), getChild<LLTextBox>("AvatarPhysicsDetailText",		true));
-	updateSliderText(getChild<LLSliderCtrl>("TerrainMeshDetail",	true), getChild<LLTextBox>("TerrainMeshDetailText",		true));
-	updateSliderText(getChild<LLSliderCtrl>("RenderPostProcess",	true), getChild<LLTextBox>("PostProcessText",			true));
-	updateSliderText(getChild<LLSliderCtrl>("SkyMeshDetail",		true), getChild<LLTextBox>("SkyMeshDetailText",			true));
-	updateSliderText(getChild<LLSliderCtrl>("TerrainDetail",		true), getChild<LLTextBox>("TerrainDetailText",			true));	
-    LLAvatarComplexityControls::setIndirectControls();
-	setMaxNonImpostorsText(
-        gSavedSettings.getU32("RenderAvatarMaxNonImpostors"),
-        getChild<LLTextBox>("IndirectMaxNonImpostorsText", true));
-    LLAvatarComplexityControls::setText(
-        gSavedSettings.getU32("RenderAvatarMaxComplexity"),
-        getChild<LLTextBox>("IndirectMaxComplexityText", true));
-	refreshEnabledState();
-}
-
 void LLFloaterPreference::onCommitWindowedMode()
 {
 	refresh();
@@ -1600,64 +1468,7 @@ void LLFloaterPreference::refreshUI()
 	refresh();
 }
 
-void LLFloaterPreferenceGraphicsAdvanced::updateSliderText(LLSliderCtrl* ctrl, LLTextBox* text_box)
-{
-	if (text_box == NULL || ctrl== NULL)
-		return;
-
-	// get range and points when text should change
-	F32 value = (F32)ctrl->getValue().asReal();
-	F32 min = ctrl->getMinValue();
-	F32 max = ctrl->getMaxValue();
-	F32 range = max - min;
-	llassert(range > 0);
-	F32 midPoint = min + range / 3.0f;
-	F32 highPoint = min + (2.0f * range / 3.0f);
-
-	// choose the right text
-	if (value < midPoint)
-	{
-		text_box->setText(LLTrans::getString("GraphicsQualityLow"));
-	} 
-	else if (value < highPoint)
-	{
-		text_box->setText(LLTrans::getString("GraphicsQualityMid"));
-	}
-	else
-	{
-		text_box->setText(LLTrans::getString("GraphicsQualityHigh"));
-	}
-}
-
-void LLFloaterPreferenceGraphicsAdvanced::updateMaxNonImpostors()
-{
-	// Called when the IndirectMaxNonImpostors control changes
-	// Responsible for fixing the slider label (IndirectMaxNonImpostorsText) and setting RenderAvatarMaxNonImpostors
-	LLSliderCtrl* ctrl = getChild<LLSliderCtrl>("IndirectMaxNonImpostors",true);
-	U32 value = ctrl->getValue().asInteger();
-
-	if (0 == value || LLVOAvatar::NON_IMPOSTORS_MAX_SLIDER <= value)
-	{
-		value=0;
-	}
-	gSavedSettings.setU32("RenderAvatarMaxNonImpostors", value);
-	LLVOAvatar::updateImpostorRendering(value); // make it effective immediately
-	setMaxNonImpostorsText(value, getChild<LLTextBox>("IndirectMaxNonImpostorsText"));
-}
-
-void LLFloaterPreferenceGraphicsAdvanced::setMaxNonImpostorsText(U32 value, LLTextBox* text_box)
-{
-	if (0 == value)
-	{
-		text_box->setText(LLTrans::getString("no_limit"));
-	}
-	else
-	{
-		text_box->setText(llformat("%d", value));
-	}
-}
-
-void LLAvatarComplexityControls::updateMax(LLSliderCtrl* slider, LLTextBox* value_label)
+void LLAvatarComplexityControls::updateMax(LLSliderCtrl* slider, LLTextBox* value_label, bool short_val)
 {
 	// Called when the IndirectMaxComplexity control changes
 	// Responsible for fixing the slider label (IndirectMaxComplexityText) and setting RenderAvatarMaxComplexity
@@ -1679,10 +1490,10 @@ void LLAvatarComplexityControls::updateMax(LLSliderCtrl* slider, LLTextBox* valu
 	}
 
 	gSavedSettings.setU32("RenderAvatarMaxComplexity", (U32)max_arc);
-	setText(max_arc, value_label);
+	setText(max_arc, value_label, short_val);
 }
 
-void LLAvatarComplexityControls::setText(U32 value, LLTextBox* text_box)
+void LLAvatarComplexityControls::setText(U32 value, LLTextBox* text_box, bool short_val)
 {
 	if (0 == value)
 	{
@@ -1690,24 +1501,40 @@ void LLAvatarComplexityControls::setText(U32 value, LLTextBox* text_box)
 	}
 	else
 	{
-		text_box->setText(llformat("%d", value));
+        std::string text_value = short_val ? llformat("%d", value / 1000) : llformat("%d", value);
+        text_box->setText(text_value);
 	}
 }
 
+void LLAvatarComplexityControls::updateMaxRenderTime(LLSliderCtrl* slider, LLTextBox* value_label, bool short_val)
+{
+    setRenderTimeText((F32)(LLPerfStats::renderAvatarMaxART_ns/1000), value_label, short_val);
+}
+
+void LLAvatarComplexityControls::setRenderTimeText(F32 value, LLTextBox* text_box, bool short_val)
+{
+    if (0 == value)
+    {
+        text_box->setText(LLTrans::getString("no_limit"));
+    }
+    else
+    {
+        text_box->setText(llformat("%.0f", value));
+    }
+}
+
 void LLFloaterPreference::updateMaxComplexity()
 {
 	// Called when the IndirectMaxComplexity control changes
     LLAvatarComplexityControls::updateMax(
         getChild<LLSliderCtrl>("IndirectMaxComplexity"),
         getChild<LLTextBox>("IndirectMaxComplexityText"));
+}
 
-    LLFloaterPreferenceGraphicsAdvanced* floater_graphics_advanced = LLFloaterReg::findTypedInstance<LLFloaterPreferenceGraphicsAdvanced>("prefs_graphics_advanced");
-    if (floater_graphics_advanced)
-    {
-        LLAvatarComplexityControls::updateMax(
-            floater_graphics_advanced->getChild<LLSliderCtrl>("IndirectMaxComplexity"),
-            floater_graphics_advanced->getChild<LLTextBox>("IndirectMaxComplexityText"));
-    }
+void LLFloaterPreference::updateComplexityText()
+{
+    LLAvatarComplexityControls::setText(gSavedSettings.getU32("RenderAvatarMaxComplexity"),
+        getChild<LLTextBox>("IndirectMaxComplexityText", true));
 }
 
 bool LLFloaterPreference::loadFromFilename(const std::string& filename, std::map<std::string, std::string> &label_map)
@@ -1749,22 +1576,6 @@ bool LLFloaterPreference::loadFromFilename(const std::string& filename, std::map
     return true;
 }
 
-void LLFloaterPreferenceGraphicsAdvanced::updateMaxComplexity()
-{
-	// Called when the IndirectMaxComplexity control changes
-    LLAvatarComplexityControls::updateMax(
-        getChild<LLSliderCtrl>("IndirectMaxComplexity"),
-        getChild<LLTextBox>("IndirectMaxComplexityText"));
-
-    LLFloaterPreference* floater_preferences = LLFloaterReg::findTypedInstance<LLFloaterPreference>("preferences");
-    if (floater_preferences)
-    {
-        LLAvatarComplexityControls::updateMax(
-            floater_preferences->getChild<LLSliderCtrl>("IndirectMaxComplexity"),
-            floater_preferences->getChild<LLTextBox>("IndirectMaxComplexityText"));
-    }
-}
-
 void LLFloaterPreference::onChangeMaturity()
 {
 	U8 sim_access = gSavedSettings.getU32("PreferredMaturity");
@@ -1877,6 +1688,15 @@ void LLFloaterPreference::onClickRenderExceptions()
     LLFloaterReg::showInstance("avatar_render_settings");
 }
 
+void LLFloaterPreference::onClickAutoAdjustments()
+{
+    LLFloaterPerformance* performance_floater = LLFloaterReg::showTypedInstance<LLFloaterPerformance>("performance");
+    if (performance_floater)
+    {
+        performance_floater->showAutoadjustmentsPanel();
+    }
+}
+
 void LLFloaterPreference::onClickAdvanced()
 {
 	LLFloaterReg::showInstance("prefs_graphics_advanced");
@@ -1899,6 +1719,22 @@ void LLFloaterPreference::onClickActionChange()
     updateClickActionControls();
 }
 
+void LLFloaterPreference::onAtmosShaderChange()
+{
+    LLCheckBoxCtrl* ctrl_alm = getChild<LLCheckBoxCtrl>("UseLightShaders");
+    if(ctrl_alm)
+    {
+        //Deferred/SSAO/Shadows
+        BOOL bumpshiny = LLCubeMap::sUseCubeMaps && LLFeatureManager::getInstance()->isFeatureAvailable("RenderObjectBump") && gSavedSettings.getBOOL("RenderObjectBump");
+        BOOL shaders = gSavedSettings.getBOOL("WindLightUseAtmosShaders");
+        BOOL enabled = LLFeatureManager::getInstance()->isFeatureAvailable("RenderDeferred") &&
+                        bumpshiny &&
+                        shaders;
+
+        ctrl_alm->setEnabled(enabled);
+    }
+}
+
 void LLFloaterPreference::onClickPermsDefault()
 {
 	LLFloaterReg::showInstance("perms_default");
@@ -3219,18 +3055,6 @@ void LLPanelPreferenceControls::onCancelKeyBind()
     pControlsTable->deselectAllItems();
 }
 
-LLFloaterPreferenceGraphicsAdvanced::LLFloaterPreferenceGraphicsAdvanced(const LLSD& key)
-	: LLFloater(key)
-{
-    mCommitCallbackRegistrar.add("Pref.RenderOptionUpdate",            boost::bind(&LLFloaterPreferenceGraphicsAdvanced::onRenderOptionEnable, this));
-	mCommitCallbackRegistrar.add("Pref.UpdateIndirectMaxNonImpostors", boost::bind(&LLFloaterPreferenceGraphicsAdvanced::updateMaxNonImpostors,this));
-	mCommitCallbackRegistrar.add("Pref.UpdateIndirectMaxComplexity",   boost::bind(&LLFloaterPreferenceGraphicsAdvanced::updateMaxComplexity,this));
-}
-
-LLFloaterPreferenceGraphicsAdvanced::~LLFloaterPreferenceGraphicsAdvanced()
-{
-}
-
 LLFloaterPreferenceProxy::LLFloaterPreferenceProxy(const LLSD& key)
 	: LLFloater(key),
 	  mSocksSettingsDirty(false)
@@ -3240,41 +3064,6 @@ LLFloaterPreferenceProxy::LLFloaterPreferenceProxy(const LLSD& key)
 	mCommitCallbackRegistrar.add("Proxy.Change",            boost::bind(&LLFloaterPreferenceProxy::onChangeSocksSettings, this));
 }
 
-BOOL LLFloaterPreferenceGraphicsAdvanced::postBuild()
-{
-    // Don't do this on Mac as their braindead GL versioning
-    // sets this when 8x and 16x are indeed available
-    //
-#if !LL_DARWIN
-    if (gGLManager.mIsIntel || gGLManager.mGLVersion < 3.f)
-    { //remove FSAA settings above "4x"
-        LLComboBox* combo = getChild<LLComboBox>("fsaa");
-        combo->remove("8x");
-        combo->remove("16x");
-    }
-	
-	LLCheckBoxCtrl *use_HiDPI = getChild<LLCheckBoxCtrl>("use HiDPI");
-	use_HiDPI->setVisible(FALSE);
-#endif
-
-    return TRUE;
-}
-
-void LLFloaterPreferenceGraphicsAdvanced::onOpen(const LLSD& key)
-{
-    refresh();
-}
-
-void LLFloaterPreferenceGraphicsAdvanced::onClickCloseBtn(bool app_quitting)
-{
-	LLFloaterPreference* instance = LLFloaterReg::findTypedInstance<LLFloaterPreference>("preferences");
-	if (instance)
-	{
-		instance->cancel();
-	}
-	updateMaxComplexity();
-}
-
 LLFloaterPreferenceProxy::~LLFloaterPreferenceProxy()
 {
 }
diff --git a/indra/newview/llfloaterpreference.h b/indra/newview/llfloaterpreference.h
index bab1ffdd56..04ac87364d 100644
--- a/indra/newview/llfloaterpreference.h
+++ b/indra/newview/llfloaterpreference.h
@@ -109,10 +109,11 @@ public:
 	void updateClickActionViews();
     void updateSearchableItems();
 
-protected:	
 	void		onBtnOK(const LLSD& userdata);
 	void		onBtnCancel(const LLSD& userdata);
 
+protected:	
+
 	void		onClickClearCache();			// Clear viewer texture cache, file cache on next startup
 	void		onClickBrowserClearCache();		// Clear web history and caches as well as viewer caches above
 	void		onLanguageChange();
@@ -138,6 +139,8 @@ protected:
 	// updates click/double-click action keybindngs depending on view values
 	void updateClickActionControls();
 
+    void onAtmosShaderChange();
+
 public:
 	// This function squirrels away the current values of the controls so that
 	// cancel() can restore them.	
@@ -188,6 +191,7 @@ public:
 	void onClickAutoReplace();
 	void onClickSpellChecker();
 	void onClickRenderExceptions();
+	void onClickAutoAdjustments();
 	void onClickAdvanced();
 	void applyUIColor(LLUICtrl* ctrl, const LLSD& param);
 	void getUIColor(LLUICtrl* ctrl, const LLSD& param);
@@ -198,12 +202,16 @@ public:
 	void saveCameraPreset(std::string& preset);
 	void saveGraphicsPreset(std::string& preset);
 
+    void setRecommendedSettings();
+    void resetAutotuneSettings();
+
 private:
 
 	void onDeleteTranscripts();
 	void onDeleteTranscriptsResponse(const LLSD& notification, const LLSD& response);
 	void updateDeleteTranscriptsButton();
 	void updateMaxComplexity();
+    void updateComplexityText();
 	static bool loadFromFilename(const std::string& filename, std::map<std::string, std::string> &label_map);
 
 	static std::string sSkin;
@@ -225,6 +233,8 @@ private:
 	std::unique_ptr< ll::prefs::SearchData > mSearchData;
 	bool mSearchDataDirty;
 
+    boost::signals2::connection	mComplexityChangedSignal;
+
 	void onUpdateFilterTerm( bool force = false );
 	void collectSearchableItems();
     void filterIgnorableNotifications();
@@ -354,37 +364,13 @@ private:
 	S32 mEditingMode;
 };
 
-class LLFloaterPreferenceGraphicsAdvanced : public LLFloater
-{
-  public: 
-	LLFloaterPreferenceGraphicsAdvanced(const LLSD& key);
-	~LLFloaterPreferenceGraphicsAdvanced();
-	/*virtual*/ BOOL postBuild();
-	void onOpen(const LLSD& key);
-	void onClickCloseBtn(bool app_quitting);
-	void disableUnavailableSettings();
-	void refreshEnabledGraphics();
-	void refreshEnabledState();
-	void updateSliderText(LLSliderCtrl* ctrl, LLTextBox* text_box);
-	void updateMaxNonImpostors();
-	void setMaxNonImpostorsText(U32 value, LLTextBox* text_box);
-	void updateMaxComplexity();
-	void setMaxComplexityText(U32 value, LLTextBox* text_box);
-	static void setIndirectControls();
-	static void setIndirectMaxNonImpostors();
-	static void setIndirectMaxArc();
-	void refresh();
-	// callback for when client modifies a render option
-	void onRenderOptionEnable();
-    void onAdvancedAtmosphericsEnable();
-	LOG_CLASS(LLFloaterPreferenceGraphicsAdvanced);
-};
-
 class LLAvatarComplexityControls
 {
   public: 
-	static void updateMax(LLSliderCtrl* slider, LLTextBox* value_label);
-	static void setText(U32 value, LLTextBox* text_box);
+	static void updateMax(LLSliderCtrl* slider, LLTextBox* value_label, bool short_val = false);
+	static void setText(U32 value, LLTextBox* text_box, bool short_val = false);
+	static void updateMaxRenderTime(LLSliderCtrl* slider, LLTextBox* value_label, bool short_val = false);
+	static void setRenderTimeText(F32 value, LLTextBox* text_box, bool short_val = false);
 	static void setIndirectControls();
 	static void setIndirectMaxNonImpostors();
 	static void setIndirectMaxArc();
diff --git a/indra/newview/llfloaterpreferencesgraphicsadvanced.cpp b/indra/newview/llfloaterpreferencesgraphicsadvanced.cpp
new file mode 100644
index 0000000000..a91f0ec060
--- /dev/null
+++ b/indra/newview/llfloaterpreferencesgraphicsadvanced.cpp
@@ -0,0 +1,480 @@
+/** 
+ * @file llfloaterpreferencesgraphicsadvanced.cpp
+ * @brief floater for adjusting camera position
+ *
+ * $LicenseInfo:firstyear=2021&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2021, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "llviewerprecompiledheaders.h"
+#include "llfloaterpreferencesgraphicsadvanced.h"
+
+#include "llcheckboxctrl.h"
+#include "llcombobox.h"
+#include "llfeaturemanager.h"
+#include "llfloaterpreference.h"
+#include "llfloaterreg.h"
+#include "llnotificationsutil.h"
+#include "llsliderctrl.h"
+#include "lltextbox.h"
+#include "lltrans.h"
+#include "llviewershadermgr.h"
+#include "llviewertexturelist.h"
+#include "llvoavatar.h"
+#include "pipeline.h"
+
+
+LLFloaterPreferenceGraphicsAdvanced::LLFloaterPreferenceGraphicsAdvanced(const LLSD& key)
+    : LLFloater(key)
+{
+    mCommitCallbackRegistrar.add("Pref.RenderOptionUpdate",            boost::bind(&LLFloaterPreferenceGraphicsAdvanced::onRenderOptionEnable, this));
+    mCommitCallbackRegistrar.add("Pref.UpdateIndirectMaxNonImpostors", boost::bind(&LLFloaterPreferenceGraphicsAdvanced::updateMaxNonImpostors,this));
+    mCommitCallbackRegistrar.add("Pref.UpdateIndirectMaxComplexity",   boost::bind(&LLFloaterPreferenceGraphicsAdvanced::updateMaxComplexity,this));
+
+    mCommitCallbackRegistrar.add("Pref.Cancel", boost::bind(&LLFloaterPreferenceGraphicsAdvanced::onBtnCancel, this, _2));
+    mCommitCallbackRegistrar.add("Pref.OK",     boost::bind(&LLFloaterPreferenceGraphicsAdvanced::onBtnOK, this, _2));
+
+    gSavedSettings.getControl("RenderAvatarMaxNonImpostors")->getSignal()->connect(boost::bind(&LLFloaterPreferenceGraphicsAdvanced::updateIndirectMaxNonImpostors, this, _2));
+}
+
+LLFloaterPreferenceGraphicsAdvanced::~LLFloaterPreferenceGraphicsAdvanced()
+{
+    mComplexityChangedSignal.disconnect();
+    mLODFactorChangedSignal.disconnect();
+}
+
+BOOL LLFloaterPreferenceGraphicsAdvanced::postBuild()
+{
+    // Don't do this on Mac as their braindead GL versioning
+    // sets this when 8x and 16x are indeed available
+    //
+#if !LL_DARWIN
+    if (gGLManager.mIsIntel || gGLManager.mGLVersion < 3.f)
+    { //remove FSAA settings above "4x"
+        LLComboBox* combo = getChild<LLComboBox>("fsaa");
+        combo->remove("8x");
+        combo->remove("16x");
+    }
+
+    LLCheckBoxCtrl *use_HiDPI = getChild<LLCheckBoxCtrl>("use HiDPI");
+    use_HiDPI->setVisible(FALSE);
+#endif
+
+    mComplexityChangedSignal = gSavedSettings.getControl("RenderAvatarMaxComplexity")->getCommitSignal()->connect(boost::bind(&LLFloaterPreferenceGraphicsAdvanced::updateComplexityText, this)); 
+    mLODFactorChangedSignal = gSavedSettings.getControl("RenderVolumeLODFactor")->getCommitSignal()->connect(boost::bind(&LLFloaterPreferenceGraphicsAdvanced::updateObjectMeshDetailText, this));
+    return TRUE;
+}
+
+void LLFloaterPreferenceGraphicsAdvanced::onOpen(const LLSD& key)
+{
+    refresh();
+}
+
+void LLFloaterPreferenceGraphicsAdvanced::onClickCloseBtn(bool app_quitting)
+{
+    LLFloaterPreference* instance = LLFloaterReg::findTypedInstance<LLFloaterPreference>("preferences");
+    if (instance)
+    {
+        instance->cancel();
+    }
+    updateMaxComplexity();
+}
+
+void LLFloaterPreferenceGraphicsAdvanced::onRenderOptionEnable()
+{
+    LLFloaterPreference* instance = LLFloaterReg::findTypedInstance<LLFloaterPreference>("preferences");
+    if (instance)
+    {
+        instance->refresh();
+    }
+
+    refreshEnabledGraphics();
+}
+
+void LLFloaterPreferenceGraphicsAdvanced::onAdvancedAtmosphericsEnable()
+{
+    LLFloaterPreference* instance = LLFloaterReg::findTypedInstance<LLFloaterPreference>("preferences");
+    if (instance)
+    {
+        instance->refresh();
+    }
+
+    refreshEnabledGraphics();
+}
+
+void LLFloaterPreferenceGraphicsAdvanced::refresh()
+{
+    getChild<LLUICtrl>("fsaa")->setValue((LLSD::Integer)  gSavedSettings.getU32("RenderFSAASamples"));
+
+    // sliders and their text boxes
+    //	mPostProcess = gSavedSettings.getS32("RenderGlowResolutionPow");
+    // slider text boxes
+    updateSliderText(getChild<LLSliderCtrl>("ObjectMeshDetail",		true), getChild<LLTextBox>("ObjectMeshDetailText",		true));
+    updateSliderText(getChild<LLSliderCtrl>("FlexibleMeshDetail",	true), getChild<LLTextBox>("FlexibleMeshDetailText",	true));
+    updateSliderText(getChild<LLSliderCtrl>("TreeMeshDetail",		true), getChild<LLTextBox>("TreeMeshDetailText",		true));
+    updateSliderText(getChild<LLSliderCtrl>("AvatarMeshDetail",		true), getChild<LLTextBox>("AvatarMeshDetailText",		true));
+    updateSliderText(getChild<LLSliderCtrl>("AvatarPhysicsDetail",	true), getChild<LLTextBox>("AvatarPhysicsDetailText",		true));
+    updateSliderText(getChild<LLSliderCtrl>("TerrainMeshDetail",	true), getChild<LLTextBox>("TerrainMeshDetailText",		true));
+    updateSliderText(getChild<LLSliderCtrl>("RenderPostProcess",	true), getChild<LLTextBox>("PostProcessText",			true));
+    updateSliderText(getChild<LLSliderCtrl>("SkyMeshDetail",		true), getChild<LLTextBox>("SkyMeshDetailText",			true));
+    updateSliderText(getChild<LLSliderCtrl>("TerrainDetail",		true), getChild<LLTextBox>("TerrainDetailText",			true));	
+    LLAvatarComplexityControls::setIndirectControls();
+    setMaxNonImpostorsText(
+        gSavedSettings.getU32("RenderAvatarMaxNonImpostors"),
+        getChild<LLTextBox>("IndirectMaxNonImpostorsText", true));
+    LLAvatarComplexityControls::setText(
+        gSavedSettings.getU32("RenderAvatarMaxComplexity"),
+        getChild<LLTextBox>("IndirectMaxComplexityText", true));
+    refreshEnabledState();
+}
+
+void LLFloaterPreferenceGraphicsAdvanced::refreshEnabledGraphics()
+{
+    refreshEnabledState();
+}
+
+void LLFloaterPreferenceGraphicsAdvanced::updateMaxComplexity()
+{
+    // Called when the IndirectMaxComplexity control changes
+    LLAvatarComplexityControls::updateMax(
+        getChild<LLSliderCtrl>("IndirectMaxComplexity"),
+        getChild<LLTextBox>("IndirectMaxComplexityText"));
+}
+
+void LLFloaterPreferenceGraphicsAdvanced::updateComplexityText()
+{
+    LLAvatarComplexityControls::setText(gSavedSettings.getU32("RenderAvatarMaxComplexity"),
+        getChild<LLTextBox>("IndirectMaxComplexityText", true));
+}
+
+void LLFloaterPreferenceGraphicsAdvanced::updateObjectMeshDetailText()
+{
+    updateSliderText(getChild<LLSliderCtrl>("ObjectMeshDetail", true), getChild<LLTextBox>("ObjectMeshDetailText", true));
+}
+
+void LLFloaterPreferenceGraphicsAdvanced::updateSliderText(LLSliderCtrl* ctrl, LLTextBox* text_box)
+{
+    if (text_box == NULL || ctrl== NULL)
+        return;
+
+    // get range and points when text should change
+    F32 value = (F32)ctrl->getValue().asReal();
+    F32 min = ctrl->getMinValue();
+    F32 max = ctrl->getMaxValue();
+    F32 range = max - min;
+    llassert(range > 0);
+    F32 midPoint = min + range / 3.0f;
+    F32 highPoint = min + (2.0f * range / 3.0f);
+
+    // choose the right text
+    if (value < midPoint)
+    {
+        text_box->setText(LLTrans::getString("GraphicsQualityLow"));
+    } 
+    else if (value < highPoint)
+    {
+        text_box->setText(LLTrans::getString("GraphicsQualityMid"));
+    }
+    else
+    {
+        text_box->setText(LLTrans::getString("GraphicsQualityHigh"));
+    }
+}
+
+void LLFloaterPreferenceGraphicsAdvanced::updateMaxNonImpostors()
+{
+    // Called when the IndirectMaxNonImpostors control changes
+    // Responsible for fixing the slider label (IndirectMaxNonImpostorsText) and setting RenderAvatarMaxNonImpostors
+    LLSliderCtrl* ctrl = getChild<LLSliderCtrl>("IndirectMaxNonImpostors",true);
+    U32 value = ctrl->getValue().asInteger();
+
+    if (0 == value || LLVOAvatar::NON_IMPOSTORS_MAX_SLIDER <= value)
+    {
+        value=0;
+    }
+    gSavedSettings.setU32("RenderAvatarMaxNonImpostors", value);
+    LLVOAvatar::updateImpostorRendering(value); // make it effective immediately
+    setMaxNonImpostorsText(value, getChild<LLTextBox>("IndirectMaxNonImpostorsText"));
+}
+
+void LLFloaterPreferenceGraphicsAdvanced::updateIndirectMaxNonImpostors(const LLSD& newvalue)
+{
+    U32 value = newvalue.asInteger();
+    if ((value != 0) && (value != gSavedSettings.getU32("IndirectMaxNonImpostors")))
+    {
+        gSavedSettings.setU32("IndirectMaxNonImpostors", value);
+        setMaxNonImpostorsText(value, getChild<LLTextBox>("IndirectMaxNonImpostorsText"));
+    }
+}
+
+void LLFloaterPreferenceGraphicsAdvanced::setMaxNonImpostorsText(U32 value, LLTextBox* text_box)
+{
+    if (0 == value)
+    {
+        text_box->setText(LLTrans::getString("no_limit"));
+    }
+    else
+    {
+        text_box->setText(llformat("%d", value));
+    }
+}
+
+void LLFloaterPreferenceGraphicsAdvanced::disableUnavailableSettings()
+{	
+    LLComboBox* ctrl_reflections   = getChild<LLComboBox>("Reflections");
+    LLTextBox* reflections_text = getChild<LLTextBox>("ReflectionsText");
+    LLCheckBoxCtrl* ctrl_avatar_vp     = getChild<LLCheckBoxCtrl>("AvatarVertexProgram");
+    LLCheckBoxCtrl* ctrl_avatar_cloth  = getChild<LLCheckBoxCtrl>("AvatarCloth");
+    LLCheckBoxCtrl* ctrl_wind_light    = getChild<LLCheckBoxCtrl>("WindLightUseAtmosShaders");
+    LLCheckBoxCtrl* ctrl_deferred = getChild<LLCheckBoxCtrl>("UseLightShaders");
+    LLComboBox* ctrl_shadows = getChild<LLComboBox>("ShadowDetail");
+    LLTextBox* shadows_text = getChild<LLTextBox>("RenderShadowDetailText");
+    LLCheckBoxCtrl* ctrl_ssao = getChild<LLCheckBoxCtrl>("UseSSAO");
+    LLCheckBoxCtrl* ctrl_dof = getChild<LLCheckBoxCtrl>("UseDoF");
+    LLSliderCtrl* sky = getChild<LLSliderCtrl>("SkyMeshDetail");
+    LLTextBox* sky_text = getChild<LLTextBox>("SkyMeshDetailText");
+
+    // disabled windlight
+    if (!LLFeatureManager::getInstance()->isFeatureAvailable("WindLightUseAtmosShaders"))
+    {
+        ctrl_wind_light->setEnabled(FALSE);
+        ctrl_wind_light->setValue(FALSE);
+
+        sky->setEnabled(FALSE);
+        sky_text->setEnabled(FALSE);
+
+        //deferred needs windlight, disable deferred
+        ctrl_shadows->setEnabled(FALSE);
+        ctrl_shadows->setValue(0);
+        shadows_text->setEnabled(FALSE);
+
+        ctrl_ssao->setEnabled(FALSE);
+        ctrl_ssao->setValue(FALSE);
+
+        ctrl_dof->setEnabled(FALSE);
+        ctrl_dof->setValue(FALSE);
+
+        ctrl_deferred->setEnabled(FALSE);
+        ctrl_deferred->setValue(FALSE);
+    }
+
+    // disabled deferred
+    if (!LLFeatureManager::getInstance()->isFeatureAvailable("RenderDeferred"))
+    {
+        ctrl_shadows->setEnabled(FALSE);
+        ctrl_shadows->setValue(0);
+        shadows_text->setEnabled(FALSE);
+
+        ctrl_ssao->setEnabled(FALSE);
+        ctrl_ssao->setValue(FALSE);
+
+        ctrl_dof->setEnabled(FALSE);
+        ctrl_dof->setValue(FALSE);
+
+        ctrl_deferred->setEnabled(FALSE);
+        ctrl_deferred->setValue(FALSE);
+    }
+
+    // disabled deferred SSAO
+    if (!LLFeatureManager::getInstance()->isFeatureAvailable("RenderDeferredSSAO"))
+    {
+        ctrl_ssao->setEnabled(FALSE);
+        ctrl_ssao->setValue(FALSE);
+    }
+
+    // disabled deferred shadows
+    if (!LLFeatureManager::getInstance()->isFeatureAvailable("RenderShadowDetail"))
+    {
+        ctrl_shadows->setEnabled(FALSE);
+        ctrl_shadows->setValue(0);
+        shadows_text->setEnabled(FALSE);
+    }
+
+    // disabled reflections
+    if (!LLFeatureManager::getInstance()->isFeatureAvailable("RenderReflectionDetail"))
+    {
+        ctrl_reflections->setEnabled(FALSE);
+        ctrl_reflections->setValue(FALSE);
+        reflections_text->setEnabled(FALSE);
+    }
+
+    // disabled av
+    if (!LLFeatureManager::getInstance()->isFeatureAvailable("RenderAvatarVP"))
+    {
+        ctrl_avatar_vp->setEnabled(FALSE);
+        ctrl_avatar_vp->setValue(FALSE);
+
+        ctrl_avatar_cloth->setEnabled(FALSE);
+        ctrl_avatar_cloth->setValue(FALSE);
+
+        //deferred needs AvatarVP, disable deferred
+        ctrl_shadows->setEnabled(FALSE);
+        ctrl_shadows->setValue(0);
+        shadows_text->setEnabled(FALSE);
+
+        ctrl_ssao->setEnabled(FALSE);
+        ctrl_ssao->setValue(FALSE);
+
+        ctrl_dof->setEnabled(FALSE);
+        ctrl_dof->setValue(FALSE);
+
+        ctrl_deferred->setEnabled(FALSE);
+        ctrl_deferred->setValue(FALSE);
+    }
+
+    // disabled cloth
+    if (!LLFeatureManager::getInstance()->isFeatureAvailable("RenderAvatarCloth"))
+    {
+        ctrl_avatar_cloth->setEnabled(FALSE);
+        ctrl_avatar_cloth->setValue(FALSE);
+    }
+}
+
+void LLFloaterPreferenceGraphicsAdvanced::refreshEnabledState()
+{
+    LLComboBox* ctrl_reflections = getChild<LLComboBox>("Reflections");
+    LLTextBox* reflections_text = getChild<LLTextBox>("ReflectionsText");
+
+    // Reflections
+    BOOL reflections = LLCubeMap::sUseCubeMaps;
+    ctrl_reflections->setEnabled(reflections);
+    reflections_text->setEnabled(reflections);
+
+    // Bump & Shiny	
+    LLCheckBoxCtrl* bumpshiny_ctrl = getChild<LLCheckBoxCtrl>("BumpShiny");
+    bool bumpshiny = LLCubeMap::sUseCubeMaps && LLFeatureManager::getInstance()->isFeatureAvailable("RenderObjectBump");
+    bumpshiny_ctrl->setEnabled(bumpshiny ? TRUE : FALSE);
+
+    // Avatar Mode
+    // Enable Avatar Shaders
+    LLCheckBoxCtrl* ctrl_avatar_vp = getChild<LLCheckBoxCtrl>("AvatarVertexProgram");
+    // Avatar Render Mode
+    LLCheckBoxCtrl* ctrl_avatar_cloth = getChild<LLCheckBoxCtrl>("AvatarCloth");
+
+    bool avatar_vp_enabled = LLFeatureManager::getInstance()->isFeatureAvailable("RenderAvatarVP");
+    if (LLViewerShaderMgr::sInitialized)
+    {
+        S32 max_avatar_shader = LLViewerShaderMgr::instance()->mMaxAvatarShaderLevel;
+        avatar_vp_enabled = (max_avatar_shader > 0) ? TRUE : FALSE;
+    }
+
+    ctrl_avatar_vp->setEnabled(avatar_vp_enabled);
+
+    if (gSavedSettings.getBOOL("RenderAvatarVP") == FALSE)
+    {
+        ctrl_avatar_cloth->setEnabled(FALSE);
+    } 
+    else
+    {
+        ctrl_avatar_cloth->setEnabled(TRUE);
+    }
+
+    // Vertex Shaders, Global Shader Enable
+    // SL-12594 Basic shaders are always enabled. DJH TODO clean up now-orphaned state handling code
+    LLSliderCtrl* terrain_detail = getChild<LLSliderCtrl>("TerrainDetail");   // can be linked with control var
+    LLTextBox* terrain_text = getChild<LLTextBox>("TerrainDetailText");
+
+    terrain_detail->setEnabled(FALSE);
+    terrain_text->setEnabled(FALSE);
+
+    // WindLight
+    //LLCheckBoxCtrl* ctrl_wind_light = getChild<LLCheckBoxCtrl>("WindLightUseAtmosShaders");
+    //ctrl_wind_light->setEnabled(TRUE);
+    LLSliderCtrl* sky = getChild<LLSliderCtrl>("SkyMeshDetail");
+    LLTextBox* sky_text = getChild<LLTextBox>("SkyMeshDetailText");
+    sky->setEnabled(TRUE);
+    sky_text->setEnabled(TRUE);
+
+    BOOL enabled = TRUE;
+#if 0 // deferred always on now
+    //Deferred/SSAO/Shadows
+    LLCheckBoxCtrl* ctrl_deferred = getChild<LLCheckBoxCtrl>("UseLightShaders");
+
+    enabled = LLFeatureManager::getInstance()->isFeatureAvailable("RenderDeferred") &&
+        ((bumpshiny_ctrl && bumpshiny_ctrl->get()) ? TRUE : FALSE) &&
+        (ctrl_wind_light->get()) ? TRUE : FALSE;
+
+    ctrl_deferred->setEnabled(enabled);
+#endif
+    
+    LLCheckBoxCtrl* ctrl_pbr = getChild<LLCheckBoxCtrl>("UsePBRShaders");
+
+    //PBR
+    ctrl_pbr->setEnabled(TRUE);
+
+    LLCheckBoxCtrl* ctrl_ssao = getChild<LLCheckBoxCtrl>("UseSSAO");
+    LLCheckBoxCtrl* ctrl_dof = getChild<LLCheckBoxCtrl>("UseDoF");
+    LLComboBox* ctrl_shadow = getChild<LLComboBox>("ShadowDetail");
+    LLTextBox* shadow_text = getChild<LLTextBox>("RenderShadowDetailText");
+
+    // note, okay here to get from ctrl_deferred as it's twin, ctrl_deferred2 will alway match it
+    enabled = enabled && LLFeatureManager::getInstance()->isFeatureAvailable("RenderDeferredSSAO");// && (ctrl_deferred->get() ? TRUE : FALSE);
+
+    //ctrl_deferred->set(gSavedSettings.getBOOL("RenderDeferred"));
+
+    ctrl_ssao->setEnabled(enabled);
+    ctrl_dof->setEnabled(enabled);
+
+    enabled = enabled && LLFeatureManager::getInstance()->isFeatureAvailable("RenderShadowDetail");
+
+    ctrl_shadow->setEnabled(enabled);
+    shadow_text->setEnabled(enabled);
+
+    // Hardware settings
+    
+    if (!LLFeatureManager::getInstance()->isFeatureAvailable("RenderVBOEnable"))
+    {
+        getChildView("vbo")->setEnabled(FALSE);
+    }
+
+    if (!LLFeatureManager::getInstance()->isFeatureAvailable("RenderCompressTextures"))
+    {
+        getChildView("texture compression")->setEnabled(FALSE);
+    }
+
+    // if no windlight shaders, turn off nighttime brightness, gamma, and fog distance
+    LLUICtrl* gamma_ctrl = getChild<LLUICtrl>("gamma");
+    gamma_ctrl->setEnabled(!gPipeline.canUseWindLightShaders());
+    getChildView("(brightness, lower is brighter)")->setEnabled(!gPipeline.canUseWindLightShaders());
+    getChildView("fog")->setEnabled(!gPipeline.canUseWindLightShaders());
+    getChildView("antialiasing restart")->setVisible(!LLFeatureManager::getInstance()->isFeatureAvailable("RenderDeferred"));
+
+    // now turn off any features that are unavailable
+    disableUnavailableSettings();
+}
+
+void LLFloaterPreferenceGraphicsAdvanced::onBtnOK(const LLSD& userdata)
+{
+    LLFloaterPreference* instance = LLFloaterReg::getTypedInstance<LLFloaterPreference>("preferences");
+    if (instance)
+    {
+        instance->onBtnOK(userdata);
+    }
+}
+
+void LLFloaterPreferenceGraphicsAdvanced::onBtnCancel(const LLSD& userdata)
+{
+    LLFloaterPreference* instance = LLFloaterReg::getTypedInstance<LLFloaterPreference>("preferences");
+    if (instance)
+    {
+        instance->onBtnCancel(userdata);
+    }
+}
diff --git a/indra/newview/llfloaterpreferencesgraphicsadvanced.h b/indra/newview/llfloaterpreferencesgraphicsadvanced.h
new file mode 100644
index 0000000000..2c92f3dbf1
--- /dev/null
+++ b/indra/newview/llfloaterpreferencesgraphicsadvanced.h
@@ -0,0 +1,68 @@
+/** 
+ * @file llfloaterpreferencesgraphicsadvanced.h
+ *
+ * $LicenseInfo:firstyear=2021&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2021, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LLFLOATERPREFERENCEGRAPHICSADVANCED_H
+#define LLFLOATERPREFERENCEGRAPHICSADVANCED_H
+
+#include "llcontrol.h"
+#include "llfloater.h"
+
+class LLSliderCtrl;
+class LLTextBox;
+
+class LLFloaterPreferenceGraphicsAdvanced : public LLFloater
+{
+public: 
+    LLFloaterPreferenceGraphicsAdvanced(const LLSD& key);
+    ~LLFloaterPreferenceGraphicsAdvanced();
+    /*virtual*/ BOOL postBuild();
+    void onOpen(const LLSD& key);
+    void onClickCloseBtn(bool app_quitting);
+    void disableUnavailableSettings();
+    void refreshEnabledGraphics();
+    void refreshEnabledState();
+    void updateSliderText(LLSliderCtrl* ctrl, LLTextBox* text_box);
+    void updateMaxNonImpostors();
+    void updateIndirectMaxNonImpostors(const LLSD& newvalue);
+    void setMaxNonImpostorsText(U32 value, LLTextBox* text_box);
+    void updateMaxComplexity();
+    void updateComplexityText();
+    void updateObjectMeshDetailText();
+    void refresh();
+    // callback for when client modifies a render option
+    void onRenderOptionEnable();
+    void onAdvancedAtmosphericsEnable();
+    LOG_CLASS(LLFloaterPreferenceGraphicsAdvanced);
+
+protected:	
+    void		onBtnOK(const LLSD& userdata);
+    void		onBtnCancel(const LLSD& userdata);
+
+    boost::signals2::connection	mComplexityChangedSignal;
+    boost::signals2::connection	mLODFactorChangedSignal;
+};
+
+#endif //LLFLOATERPREFERENCEGRAPHICSADVANCED_H
+
diff --git a/indra/newview/llglsandbox.cpp b/indra/newview/llglsandbox.cpp
index 3ece06d7a2..098fe89265 100644
--- a/indra/newview/llglsandbox.cpp
+++ b/indra/newview/llglsandbox.cpp
@@ -984,6 +984,7 @@ private:
 
 //-----------------------------------------------------------------------------
 // gpu_benchmark()
+//  returns measured memory bandwidth of GPU in gigabytes per second
 //-----------------------------------------------------------------------------
 F32 gpu_benchmark()
 {
diff --git a/indra/newview/llnamelistctrl.cpp b/indra/newview/llnamelistctrl.cpp
index 8058faa5c7..d7d6fa1893 100644
--- a/indra/newview/llnamelistctrl.cpp
+++ b/indra/newview/llnamelistctrl.cpp
@@ -67,7 +67,9 @@ LLNameListCtrl::LLNameListCtrl(const LLNameListCtrl::Params& p)
 	mNameColumn(p.name_column.column_name),
 	mAllowCallingCardDrop(p.allow_calling_card_drop),
 	mShortNames(p.short_names),
-	mPendingLookupsRemaining(0)
+	mPendingLookupsRemaining(0),
+    mHoverIconName("Info_Small"),
+    mNameListType(INDIVIDUAL)
 {}
 
 // public
@@ -134,7 +136,12 @@ BOOL LLNameListCtrl::handleDragAndDrop(
 
 void LLNameListCtrl::showInspector(const LLUUID& avatar_id, bool is_group, bool is_experience)
 {
-	if(is_experience)
+    if (isSpecialType())
+    {
+        mIconClickedSignal(avatar_id);
+        return;
+    }
+    if(is_experience)
 	{
 		LLFloaterReg::showInstance("experience_profile", avatar_id, true);
 		return;
@@ -215,14 +222,16 @@ BOOL LLNameListCtrl::handleToolTip(S32 x, S32 y, MASK mask)
 	S32 column_index = getColumnIndexFromOffset(x);
 	LLNameListItem* hit_item = dynamic_cast<LLNameListItem*>(hitItem(x, y));
 	LLFloater* floater = gFloaterView->getParentFloater(this);
-	if (floater 
+
+
+    if (floater 
 		&& floater->isFrontmost()
 		&& hit_item
-		&& column_index == mNameColumnIndex)
+		&& ((column_index == mNameColumnIndex) || isSpecialType()))
 	{
-		// ...this is the column with the avatar name
-		LLUUID avatar_id = hit_item->getUUID();
-		if (avatar_id.notNull())
+        // ...this is the column with the avatar name
+		LLUUID item_id = isSpecialType() ? hit_item->getSpecialID() : hit_item->getUUID();
+		if (item_id.notNull())
 		{
 			// ...valid avatar id
 
@@ -230,13 +239,13 @@ BOOL LLNameListCtrl::handleToolTip(S32 x, S32 y, MASK mask)
 			if (hit_cell)
 			{
 				S32 row_index = getItemIndex(hit_item);
-				LLRect cell_rect = getCellRect(row_index, column_index);
+				LLRect cell_rect = getCellRect(row_index, isSpecialType() ? getNumColumns() - 1 : column_index);
 				// Convert rect local to screen coordinates
 				LLRect sticky_rect;
 				localRectToScreen(cell_rect, &sticky_rect);
 
 				// Spawn at right side of cell
-				LLPointer<LLUIImage> icon = LLUI::getUIImage("Info_Small");
+				LLPointer<LLUIImage> icon = LLUI::getUIImage(mHoverIconName);
 				S32 screenX = sticky_rect.mRight - info_icon_size;
 				S32 screenY = sticky_rect.mTop - (sticky_rect.getHeight() - icon->getHeight()) / 2;
 				LLCoordGL pos(screenX, screenY);
@@ -250,7 +259,7 @@ BOOL LLNameListCtrl::handleToolTip(S32 x, S32 y, MASK mask)
 
 					LLToolTip::Params params;
 					params.background_visible(false);
-					params.click_callback(boost::bind(&LLNameListCtrl::showInspector, this, avatar_id, is_group, is_experience));
+					params.click_callback(boost::bind(&LLNameListCtrl::showInspector, this, item_id, is_group, is_experience));
 					params.delay_time(0.0f);		// spawn instantly on hover
 					params.image(icon);
 					params.message("");
@@ -340,6 +349,7 @@ LLScrollListItem* LLNameListCtrl::addNameItemRow(
 
 	// use supplied name by default
 	std::string fullname = name_item.name;
+
 	switch(name_item.target)
 	{
 	case GROUP:
@@ -358,8 +368,10 @@ LLScrollListItem* LLNameListCtrl::addNameItemRow(
 		}
 		break;
 	case SPECIAL:
-		// just use supplied name
-		break;
+        {
+        item->setSpecialID(name_item.special_id());
+        return item;
+        }
 	case INDIVIDUAL:
 		{
 			LLAvatarName av_name;
@@ -370,7 +382,7 @@ LLScrollListItem* LLNameListCtrl::addNameItemRow(
 			else if (LLAvatarNameCache::get(id, &av_name))
 			{
 				if (mShortNames)
-					fullname = av_name.getDisplayName();
+					fullname = av_name.getDisplayName(true);
 				else
 					fullname = av_name.getCompleteName();
 			}
@@ -440,7 +452,8 @@ void LLNameListCtrl::removeNameItem(const LLUUID& agent_id)
 	for (item_list::iterator it = getItemList().begin(); it != getItemList().end(); it++)
 	{
 		LLScrollListItem* item = *it;
-		if (item->getUUID() == agent_id)
+        LLUUID cur_id = isSpecialType() ? dynamic_cast<LLNameListItem*>(item)->getSpecialID() : item->getUUID();
+        if (cur_id == agent_id)
 		{
 			idx = getItemIndex(item);
 			break;
@@ -471,6 +484,34 @@ LLScrollListItem* LLNameListCtrl::getNameItemByAgentId(const LLUUID& agent_id)
 	return NULL;
 }
 
+void LLNameListCtrl::selectItemBySpecialId(const LLUUID& special_id)
+{
+    if (special_id.isNull())
+    {
+        return;
+    }
+
+    for (item_list::iterator it = getItemList().begin(); it != getItemList().end(); it++)
+    {
+        LLNameListItem* item = dynamic_cast<LLNameListItem*>(*it);
+        if (item && item->getSpecialID() == special_id)
+        {
+            item->setSelected(TRUE);
+            break;
+        }
+    }
+}
+
+LLUUID LLNameListCtrl::getSelectedSpecialId()
+{
+    LLNameListItem* item = dynamic_cast<LLNameListItem*>(getFirstSelected());
+    if(item)
+    {
+        return item->getSpecialID();
+    }
+    return LLUUID();
+}
+
 void LLNameListCtrl::onAvatarNameCache(const LLUUID& agent_id,
 									   const LLAvatarName& av_name,
 									   std::string suffix,
diff --git a/indra/newview/llnamelistctrl.h b/indra/newview/llnamelistctrl.h
index 5dd5da5892..4a4bd4ba09 100644
--- a/indra/newview/llnamelistctrl.h
+++ b/indra/newview/llnamelistctrl.h
@@ -46,6 +46,8 @@ public:
 	void setIsGroup(bool is_group) { mIsGroup = is_group; }
 	bool isExperience() const { return mIsExperience; }
 	void setIsExperience(bool is_experience) { mIsExperience = is_experience; }
+    void setSpecialID(const LLUUID& special_id) { mSpecialID = special_id; }
+    const LLUUID& getSpecialID() const { return mSpecialID; }
 
 protected:
 	friend class LLNameListCtrl;
@@ -68,6 +70,8 @@ protected:
 private:
 	bool mIsGroup;
 	bool mIsExperience;
+
+    LLUUID mSpecialID;
 };
 
 
@@ -95,10 +99,12 @@ public:
 	{
 		Optional<std::string>				name;
 		Optional<ENameType, NameTypeNames>	target;
+        Optional<LLUUID>                    special_id;
 
 		NameItem()
 		:	name("name"),
-			target("target", INDIVIDUAL)
+			target("target", INDIVIDUAL),
+            special_id("special_id", LLUUID())
 		{}
 	};
 
@@ -156,6 +162,9 @@ public:
 
 	LLScrollListItem* getNameItemByAgentId(const LLUUID& agent_id);
 
+    void selectItemBySpecialId(const LLUUID& special_id);
+    LLUUID getSelectedSpecialId();
+
 	// LLView interface
 	/*virtual*/ BOOL	handleDragAndDrop(S32 x, S32 y, MASK mask,
 									  BOOL drop, EDragAndDropType cargo_type, void *cargo_data,
@@ -170,7 +179,14 @@ public:
 	/*virtual*/ void updateColumns(bool force_update);
 
 	/*virtual*/ void mouseOverHighlightNthItem( S32 index );
+
     /*virtual*/ BOOL handleRightMouseDown(S32 x, S32 y, MASK mask);
+
+    bool isSpecialType() { return (mNameListType == SPECIAL); }
+
+    void setNameListType(e_name_type type) { mNameListType = type; }
+    void setHoverIconName(std::string icon_name) { mHoverIconName = icon_name; }
+
 private:
 	void showInspector(const LLUUID& avatar_id, bool is_group, bool is_experience = false);
 	void onAvatarNameCache(const LLUUID& agent_id, const LLAvatarName& av_name, std::string suffix, std::string prefix, LLHandle<LLNameListItem> item);
@@ -187,6 +203,11 @@ private:
 
 	S32 mPendingLookupsRemaining;
 	namelist_complete_signal_t mNameListCompleteSignal;
+
+    std::string     mHoverIconName;
+    e_name_type     mNameListType;
+
+    boost::signals2::signal<void(const LLUUID &)> mIconClickedSignal;
 	
 public:
 	boost::signals2::connection setOnNameListCompleteCallback(boost::function<void(bool)> onNameListCompleteCallback) 
@@ -194,6 +215,10 @@ public:
 		return mNameListCompleteSignal.connect(onNameListCompleteCallback); 
 	}
 
+    boost::signals2::connection setIconClickedCallback(boost::function<void(const LLUUID &)> cb) 
+    { 
+        return mIconClickedSignal.connect(cb); 
+    }
 };
 
 
diff --git a/indra/newview/llpanelpresetspulldown.cpp b/indra/newview/llpanelpresetspulldown.cpp
index 23e4fa8887..f6e501f147 100644
--- a/indra/newview/llpanelpresetspulldown.cpp
+++ b/indra/newview/llpanelpresetspulldown.cpp
@@ -34,6 +34,7 @@
 #include "llbutton.h"
 #include "lltabcontainer.h"
 #include "llfloater.h"
+#include "llfloaterperformance.h"
 #include "llfloaterreg.h"
 #include "llpresetsmanager.h"
 #include "llsliderctrl.h"
@@ -50,6 +51,7 @@ LLPanelPresetsPulldown::LLPanelPresetsPulldown()
 	mHoverTimer.stop();
 
 	mCommitCallbackRegistrar.add("Presets.GoGraphicsPrefs", boost::bind(&LLPanelPresetsPulldown::onGraphicsButtonClick, this, _2));
+    mCommitCallbackRegistrar.add("Presets.GoAutofpsPrefs", boost::bind(&LLPanelPresetsPulldown::onAutofpsButtonClick, this, _2));
 	mCommitCallbackRegistrar.add("Presets.RowClick", boost::bind(&LLPanelPresetsPulldown::onRowClick, this, _2));
 
 	buildFromFile( "panel_presets_pulldown.xml");
@@ -157,3 +159,13 @@ void LLPanelPresetsPulldown::onGraphicsButtonClick(const LLSD& user_data)
 		}
 	}
 }
+
+void LLPanelPresetsPulldown::onAutofpsButtonClick(const LLSD& user_data)
+{
+    setVisible(FALSE);
+    LLFloaterPerformance* performance_floater = LLFloaterReg::showTypedInstance<LLFloaterPerformance>("performance");
+    if (performance_floater)
+    {
+        performance_floater->showAutoadjustmentsPanel();
+    }
+}
diff --git a/indra/newview/llpanelpresetspulldown.h b/indra/newview/llpanelpresetspulldown.h
index c0d32b9b21..79bd6886b1 100644
--- a/indra/newview/llpanelpresetspulldown.h
+++ b/indra/newview/llpanelpresetspulldown.h
@@ -41,6 +41,7 @@ class LLPanelPresetsPulldown : public LLPanelPulldown
 	
  private:
 	void onGraphicsButtonClick(const LLSD& user_data);
+    void onAutofpsButtonClick(const LLSD& user_data);
 	void onRowClick(const LLSD& user_data);
 
 	std::list<std::string> mPresetNames;
diff --git a/indra/newview/llperfstats.cpp b/indra/newview/llperfstats.cpp
new file mode 100644
index 0000000000..c63aae2089
--- /dev/null
+++ b/indra/newview/llperfstats.cpp
@@ -0,0 +1,550 @@
+/** 
+* @file llperfstats.cpp
+* @brief Statistics collection to support autotune and perf flaoter.
+*
+* $LicenseInfo:firstyear=2022&license=viewerlgpl$
+* Second Life Viewer Source Code
+* Copyright (C) 2022, Linden Research, Inc.
+* 
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU Lesser General Public
+* License as published by the Free Software Foundation;
+* version 2.1 of the License only.
+* 
+* This library is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+* Lesser General Public License for more details.
+* 
+* You should have received a copy of the GNU Lesser General Public
+* License along with this library; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+* 
+* Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+* $/LicenseInfo$
+*/
+
+#include "llviewerprecompiledheaders.h"
+#include "llperfstats.h"
+#include "llcontrol.h"
+#include "pipeline.h"
+#include "llagentcamera.h"
+#include "llviewerwindow.h"
+#include "llvoavatar.h"
+#include "llwindow.h"
+#include "llworld.h"
+#include <llthread.h>
+
+extern LLControlGroup gSavedSettings;
+
+namespace LLPerfStats
+{
+    std::atomic<int64_t> tunedAvatars{0};
+    std::atomic<U64> renderAvatarMaxART_ns{(U64)(ART_UNLIMITED_NANOS)}; // highest render time we'll allow without culling features
+    bool belowTargetFPS{false};
+    U32 lastGlobalPrefChange{0}; 
+    U32 lastSleepedFrame{0};
+    U64 meanFrameTime{0};
+    std::mutex bufferToggleLock{};
+
+    F64 cpu_hertz{0.0};
+    U32 vsync_max_fps{60};
+
+    Tunables tunables;
+
+    std::atomic<int> 	StatsRecorder::writeBuffer{0};
+    bool 	            StatsRecorder::collectionEnabled{true};
+    LLUUID              StatsRecorder::focusAv{LLUUID::null};
+    bool                StatsRecorder::autotuneInit{false};
+	std::array<StatsRecorder::StatsTypeMatrix,2>  StatsRecorder::statsDoubleBuffer{ {} };
+    std::array<StatsRecorder::StatsSummaryArray,2> StatsRecorder::max{ {} };
+    std::array<StatsRecorder::StatsSummaryArray,2> StatsRecorder::sum{ {} };
+
+    void Tunables::applyUpdates()
+    {
+        assert_main_thread();
+        // these following variables are proxies for pipeline statics we do not need a two way update (no llviewercontrol handler)
+        if( tuningFlag & NonImpostors ){ gSavedSettings.setU32("IndirectMaxNonImpostors", nonImpostors); };
+        if( tuningFlag & ReflectionDetail ){ gSavedSettings.setS32("RenderReflectionDetail", reflectionDetail); };
+        if( tuningFlag & FarClip ){ gSavedSettings.setF32("RenderFarClip", farClip); };
+        if( tuningFlag & UserMinDrawDistance ){ gSavedSettings.setF32("AutoTuneRenderFarClipMin", userMinDrawDistance); };
+        if( tuningFlag & UserTargetDrawDistance ){ gSavedSettings.setF32("AutoTuneRenderFarClipTarget", userTargetDrawDistance); };
+        if( tuningFlag & UserImpostorDistance ){ gSavedSettings.setF32("AutoTuneImpostorFarAwayDistance", userImpostorDistance); };
+        if( tuningFlag & UserImpostorDistanceTuningEnabled ){ gSavedSettings.setBOOL("AutoTuneImpostorByDistEnabled", userImpostorDistanceTuningEnabled); };
+        if( tuningFlag & UserFPSTuningStrategy ){ gSavedSettings.setU32("TuningFPSStrategy", userFPSTuningStrategy); };
+        if( tuningFlag & UserAutoTuneEnabled ){ gSavedSettings.setBOOL("AutoTuneFPS", userAutoTuneEnabled); };
+        if( tuningFlag & UserAutoTuneLock ){ gSavedSettings.setBOOL("AutoTuneLock", userAutoTuneLock); };
+        if( tuningFlag & UserTargetFPS ){ gSavedSettings.setU32("TargetFPS", userTargetFPS); };
+        // Note: The Max ART slider is logarithmic and thus we have an intermediate proxy value
+        if( tuningFlag & UserARTCutoff ){ gSavedSettings.setF32("RenderAvatarMaxART", userARTCutoffSliderValue); };
+        resetChanges();
+    }
+
+    void Tunables::updateRenderCostLimitFromSettings()
+    {
+        assert_main_thread();
+        const auto newval = gSavedSettings.getF32("RenderAvatarMaxART");
+        if(newval < log10(LLPerfStats::ART_UNLIMITED_NANOS/1000))
+        {
+            LLPerfStats::renderAvatarMaxART_ns = pow(10,newval)*1000;
+        }
+        else
+        {
+            LLPerfStats::renderAvatarMaxART_ns = 0;
+        }
+    }
+
+    // static 
+    void Tunables::updateSettingsFromRenderCostLimit()
+    {
+        if( userARTCutoffSliderValue != log10( ( (F32)LLPerfStats::renderAvatarMaxART_ns )/1000 ) )
+        {
+            if( LLPerfStats::renderAvatarMaxART_ns != 0 )
+            {
+                updateUserARTCutoffSlider(log10( ( (F32)LLPerfStats::renderAvatarMaxART_ns )/1000 ) );
+            }
+            else
+            {
+                updateUserARTCutoffSlider(log10( (F32)LLPerfStats::ART_UNLIMITED_NANOS/1000 ) );
+            }
+        }        
+    }
+
+    void Tunables::initialiseFromSettings()
+    {
+        assert_main_thread();
+        // the following variables are two way and have "push" in llviewercontrol 
+        LLPerfStats::tunables.userMinDrawDistance = gSavedSettings.getF32("AutoTuneRenderFarClipMin");
+        LLPerfStats::tunables.userTargetDrawDistance = gSavedSettings.getF32("AutoTuneRenderFarClipTarget");
+        LLPerfStats::tunables.userImpostorDistance = gSavedSettings.getF32("AutoTuneImpostorFarAwayDistance");
+        LLPerfStats::tunables.userImpostorDistanceTuningEnabled = gSavedSettings.getBOOL("AutoTuneImpostorByDistEnabled");
+        LLPerfStats::tunables.userFPSTuningStrategy = gSavedSettings.getU32("TuningFPSStrategy");
+        LLPerfStats::tunables.userTargetFPS = gSavedSettings.getU32("TargetFPS");
+        LLPerfStats::tunables.vsyncEnabled = gSavedSettings.getBOOL("RenderVSyncEnable");
+
+        LLPerfStats::tunables.userAutoTuneLock = gSavedSettings.getBOOL("AutoTuneLock") && gSavedSettings.getU32("KeepAutoTuneLock");
+
+        if(gSavedSettings.getBOOL("AutoTuneLock") && !gSavedSettings.getU32("KeepAutoTuneLock"))
+        {
+            gSavedSettings.setBOOL("AutoTuneLock", FALSE);
+        }
+
+        LLPerfStats::tunables.userAutoTuneEnabled = LLPerfStats::tunables.userAutoTuneLock;
+
+        if (LLPerfStats::tunables.userAutoTuneEnabled && !gSavedSettings.getBOOL("AutoTuneFPS"))
+        {
+            gSavedSettings.setBOOL("AutoTuneFPS", TRUE);
+        }
+
+        // Note: The Max ART slider is logarithmic and thus we have an intermediate proxy value
+        updateRenderCostLimitFromSettings();
+        resetChanges();
+    }
+
+    StatsRecorder::StatsRecorder():q(1024*16),t(&StatsRecorder::run)
+    {
+        // create a queue
+        // create a thread to consume from the queue
+        tunables.initialiseFromSettings();
+        LLPerfStats::cpu_hertz = (F64)LLTrace::BlockTimer::countsPerSecond();
+        LLPerfStats::vsync_max_fps = gViewerWindow->getWindow()->getRefreshRate();
+        t.detach();
+    }
+
+    // static
+    void StatsRecorder::toggleBuffer()
+    {
+        LL_PROFILE_ZONE_SCOPED_CATEGORY_STATS;
+        using ST = StatType_t;
+
+        bool unreliable{false};
+        LLPerfStats::StatsRecorder::getSceneStat(LLPerfStats::StatType_t::RENDER_FRAME);
+        auto& sceneStats = statsDoubleBuffer[writeBuffer][static_cast<size_t>(ObjType_t::OT_GENERAL)][LLUUID::null];
+        auto& lastStats = statsDoubleBuffer[writeBuffer ^ 1][static_cast<size_t>(ObjType_t::OT_GENERAL)][LLUUID::null];
+
+        static constexpr std::initializer_list<StatType_t> sceneStatsToAvg = {
+            StatType_t::RENDER_FRAME, 
+            StatType_t::RENDER_DISPLAY, 
+            StatType_t::RENDER_HUDS,
+            StatType_t::RENDER_UI,
+            StatType_t::RENDER_SWAP,
+            // RENDER_LFS,
+            // RENDER_MESHREPO,
+            StatType_t::RENDER_IDLE };
+
+        static constexpr std::initializer_list<StatType_t> avatarStatsToAvg = {
+            StatType_t::RENDER_GEOMETRY, 
+            StatType_t::RENDER_SHADOWS, 
+            StatType_t::RENDER_COMBINED,
+            StatType_t::RENDER_IDLE };
+
+
+        if( /*sceneStats[static_cast<size_t>(StatType_t::RENDER_FPSLIMIT)] != 0 ||*/ sceneStats[static_cast<size_t>(StatType_t::RENDER_SLEEP)] != 0 )
+        {
+            unreliable = true;
+            //lastStats[static_cast<size_t>(StatType_t::RENDER_FPSLIMIT)] = sceneStats[static_cast<size_t>(StatType_t::RENDER_FPSLIMIT)];
+            lastStats[static_cast<size_t>(StatType_t::RENDER_SLEEP)] = sceneStats[static_cast<size_t>(StatType_t::RENDER_SLEEP)];
+            lastStats[static_cast<size_t>(StatType_t::RENDER_FRAME)] = sceneStats[static_cast<size_t>(StatType_t::RENDER_FRAME)]; //  bring over the total frame render time to deal with region crossing overlap issues
+        }
+
+        if(!unreliable)
+        {
+            // only use these stats when things are reliable. 
+
+            for(auto & statEntry : sceneStatsToAvg)
+            {
+                auto avg = lastStats[static_cast<size_t>(statEntry)];
+                auto val = sceneStats[static_cast<size_t>(statEntry)];
+                sceneStats[static_cast<size_t>(statEntry)] = avg + (val / SMOOTHING_PERIODS) - (avg / SMOOTHING_PERIODS);
+                // LL_INFOS("scenestats") << "Scenestat: " << static_cast<size_t>(statEntry) << " before=" << avg << " new=" << val << " newavg=" << statsDoubleBuffer[writeBuffer][static_cast<size_t>(ObjType_t::OT_GENERAL)][LLUUID::null][static_cast<size_t>(statEntry)] << LL_ENDL;
+            }
+        }
+// Allow attachment times etc to update even when FPS limited or sleeping.
+        auto& statsMap = statsDoubleBuffer[writeBuffer][static_cast<size_t>(ObjType_t::OT_ATTACHMENT)];
+        for(auto& stat_entry : statsMap)
+        {
+            auto val = stat_entry.second[static_cast<size_t>(ST::RENDER_COMBINED)];
+            if(val > SMOOTHING_PERIODS){
+                auto avg = statsDoubleBuffer[writeBuffer ^ 1][static_cast<size_t>(ObjType_t::OT_ATTACHMENT)][stat_entry.first][static_cast<size_t>(ST::RENDER_COMBINED)];
+                stat_entry.second[static_cast<size_t>(ST::RENDER_COMBINED)] = avg + (val / SMOOTHING_PERIODS) - (avg / SMOOTHING_PERIODS);
+            }
+        }
+
+
+        auto& statsMapAv = statsDoubleBuffer[writeBuffer][static_cast<size_t>(ObjType_t::OT_AVATAR)];
+        for(auto& stat_entry : statsMapAv)
+        {
+            for(auto& stat : avatarStatsToAvg)
+            {
+                auto val = stat_entry.second[static_cast<size_t>(stat)];
+                if(val > SMOOTHING_PERIODS)
+                {
+                    auto avg = statsDoubleBuffer[writeBuffer ^ 1][static_cast<size_t>(ObjType_t::OT_AVATAR)][stat_entry.first][static_cast<size_t>(stat)];
+                    stat_entry.second[static_cast<size_t>(stat)] = avg + (val / SMOOTHING_PERIODS) - (avg / SMOOTHING_PERIODS);
+                }
+            }
+        }
+
+        // swap the buffers
+        if(enabled())
+        {
+            std::lock_guard<std::mutex> lock{bufferToggleLock};
+            writeBuffer ^= 1;
+        }; // note we are relying on atomic updates here. The risk is low and would cause minor errors in the stats display. 
+
+        // clean the write maps in all cases.
+        auto& statsTypeMatrix = statsDoubleBuffer[writeBuffer];
+        for(auto& statsMapByType : statsTypeMatrix)
+        {
+            LL_PROFILE_ZONE_NAMED_CATEGORY_STATS("Clear stats maps");
+            for(auto& stat_entry : statsMapByType)
+            {
+                std::fill_n(stat_entry.second.begin() ,static_cast<size_t>(ST::STATS_COUNT),0);
+            }
+            statsMapByType.clear();
+        }
+        for(int i=0; i< static_cast<size_t>(ObjType_t::OT_COUNT); i++)
+        {
+            LL_PROFILE_ZONE_NAMED_CATEGORY_STATS("clear max/sum");
+            max[writeBuffer][i].fill(0);
+            sum[writeBuffer][i].fill(0);
+        }
+
+        // and now adjust the proxy vars so that the main thread can adjust the visuals.
+        if(autotuneInit && tunables.userAutoTuneEnabled)
+        {
+            updateAvatarParams();
+        }
+    }
+
+    // clear buffers when we change region or need a hard reset.
+    // static 
+    void StatsRecorder::clearStatsBuffers()
+    {
+        LL_PROFILE_ZONE_SCOPED_CATEGORY_STATS;
+        using ST = StatType_t;
+
+        auto& statsTypeMatrix = statsDoubleBuffer[writeBuffer];
+        for(auto& statsMap : statsTypeMatrix)
+        {
+            LL_PROFILE_ZONE_NAMED_CATEGORY_STATS("Clear stats maps");
+            for(auto& stat_entry : statsMap)
+            {
+                std::fill_n(stat_entry.second.begin() ,static_cast<size_t>(ST::STATS_COUNT),0);
+            }
+            statsMap.clear();
+        }
+        for(int i=0; i< static_cast<size_t>(ObjType_t::OT_COUNT); i++)
+        {
+            LL_PROFILE_ZONE_NAMED_CATEGORY_STATS("clear max/sum");
+            max[writeBuffer][i].fill(0);
+            sum[writeBuffer][i].fill(0);
+        }
+        // swap the clean buffers in
+        if(enabled())
+        {
+            std::lock_guard<std::mutex> lock{bufferToggleLock};
+            writeBuffer ^= 1;
+        }; 
+        // repeat before we start processing new stuff
+        for(auto& statsMap : statsTypeMatrix)
+        {
+            LL_PROFILE_ZONE_NAMED_CATEGORY_STATS("Clear stats maps");
+            for(auto& stat_entry : statsMap)
+            {
+                std::fill_n(stat_entry.second.begin() ,static_cast<size_t>(ST::STATS_COUNT),0);
+            }
+            statsMap.clear();
+        }
+        for(int i=0; i< static_cast<size_t>(ObjType_t::OT_COUNT); i++)
+        {
+            LL_PROFILE_ZONE_NAMED_CATEGORY_STATS("clear max/sum");
+            max[writeBuffer][i].fill(0);
+            sum[writeBuffer][i].fill(0);
+        }
+    }
+
+    //static
+    int StatsRecorder::countNearbyAvatars(S32 distance)
+    {
+        const auto our_pos = gAgentCamera.getCameraPositionGlobal();
+
+       	std::vector<LLVector3d> positions;
+	    uuid_vec_t avatar_ids;
+        LLWorld::getInstance()->getAvatars(&avatar_ids, &positions, our_pos, distance);
+        return positions.size();
+	}
+
+    const U32 NUM_PERIODS = 50;
+    void StatsRecorder::updateMeanFrameTime(U64 cur_frame_time_raw)
+    {
+        static std::deque<U64> frame_time_deque;
+        frame_time_deque.push_front(cur_frame_time_raw);
+        if (frame_time_deque.size() > NUM_PERIODS)
+        {
+            frame_time_deque.pop_back();
+        }
+        
+        std::vector<U64> buf(frame_time_deque.begin(), frame_time_deque.end());
+        std::sort(buf.begin(), buf.end());
+
+        LLPerfStats::meanFrameTime = (buf.size() % 2 == 0) ? (buf[buf.size() / 2 - 1] + buf[buf.size() / 2]) / 2 : buf[buf.size() / 2];
+    }
+    U64 StatsRecorder::getMeanTotalFrameTime()
+    {
+        return LLPerfStats::meanFrameTime;
+    }
+
+    // static
+    void StatsRecorder::updateAvatarParams()
+    {
+        if(tunables.autoTuneTimeout)
+        {
+            LLPerfStats::lastSleepedFrame = gFrameCount;
+            tunables.autoTuneTimeout = false;
+            return;
+        }
+        // sleep time is basically forced sleep when window out of focus
+        auto tot_sleep_time_raw = LLPerfStats::StatsRecorder::getSceneStat(LLPerfStats::StatType_t::RENDER_SLEEP);
+        // similar to sleep time, induced by FPS limit
+        //auto tot_limit_time_raw = LLPerfStats::StatsRecorder::getSceneStat(LLPerfStats::StatType_t::RENDER_FPSLIMIT);
+
+
+        // the time spent this frame on the "doFrame" call. Treated as "tot time for frame"
+        auto tot_frame_time_raw = LLPerfStats::StatsRecorder::getSceneStat(LLPerfStats::StatType_t::RENDER_FRAME);
+
+        if( tot_sleep_time_raw != 0 )
+        {
+            // Note: we do not average sleep 
+            // if at some point we need to, the averaging will need to take this into account or 
+            // we forever think we're in the background due to residuals.
+            LL_DEBUGS() << "No tuning when not in focus" << LL_ENDL;
+            LLPerfStats::lastSleepedFrame = gFrameCount;
+            return;
+        }
+
+        U32 target_fps = tunables.vsyncEnabled ? std::min(LLPerfStats::vsync_max_fps, tunables.userTargetFPS) : tunables.userTargetFPS;
+
+        if(LLPerfStats::lastSleepedFrame != 0)
+        {
+            // wait a short time after viewer regains focus
+            if((gFrameCount - LLPerfStats::lastSleepedFrame) > target_fps * 5)
+            {
+                LLPerfStats::lastSleepedFrame = 0;
+            }
+            else
+            {
+                return;
+            }
+        }
+        updateMeanFrameTime(tot_frame_time_raw);
+
+        if(tunables.userImpostorDistanceTuningEnabled)
+        {
+            // if we have less than the user's "max Non-Impostors" avatars within the desired range then adjust the limit.
+            // also adjusts back up again for nearby crowds.
+            auto count = countNearbyAvatars(std::min(LLPipeline::RenderFarClip, tunables.userImpostorDistance));
+            if( count != tunables.nonImpostors )
+            {
+                tunables.updateNonImposters( (count < LLVOAvatar::NON_IMPOSTORS_MAX_SLIDER)?count : LLVOAvatar::NON_IMPOSTORS_MAX_SLIDER );
+                LL_DEBUGS("AutoTune") << "There are " << count << "avatars within " << std::min(LLPipeline::RenderFarClip, tunables.userImpostorDistance) << "m of the camera" << LL_ENDL;
+            }
+        }
+
+        auto av_render_max_raw = LLPerfStats::StatsRecorder::getMax(ObjType_t::OT_AVATAR, LLPerfStats::StatType_t::RENDER_COMBINED);
+        // Is our target frame time lower than current? If so we need to take action to reduce draw overheads.
+        // cumulative avatar time (includes idle processing, attachments and base av)
+        auto tot_avatar_time_raw = LLPerfStats::StatsRecorder::getSum(ObjType_t::OT_AVATAR, LLPerfStats::StatType_t::RENDER_COMBINED);
+
+        // The frametime budget we have based on the target FPS selected
+        auto target_frame_time_raw = (U64)llround(LLPerfStats::cpu_hertz / (target_fps == 0 ? 1 : target_fps));
+        // LL_INFOS() << "Effective FPS(raw):" << tot_frame_time_raw << " Target:" << target_frame_time_raw << LL_ENDL;
+        auto inferredFPS{1000/(U32)std::max(raw_to_ms(tot_frame_time_raw),1.0)};
+        U32 settingsChangeFrequency{inferredFPS > 50?inferredFPS:50};
+        /*if( tot_limit_time_raw != 0)
+        {
+            // This could be problematic.
+            tot_frame_time_raw -= tot_limit_time_raw;
+        }*/
+        
+        F64 time_buf = target_frame_time_raw * 0.1;
+
+        // 1) Is the target frame time lower than current?
+        if ((target_frame_time_raw + time_buf) <= tot_frame_time_raw)
+        {
+            if (target_frame_time_raw - time_buf >= getMeanTotalFrameTime())
+            {
+                belowTargetFPS = false;
+                LLPerfStats::lastGlobalPrefChange = gFrameCount;
+                return;
+            }
+
+            if(belowTargetFPS == false)
+            {
+                // this is the first frame under. hold fire to add a little hysteresis
+                belowTargetFPS = true;
+                LLPerfStats::lastGlobalPrefChange = gFrameCount;
+            }
+            // if so we've got work to do
+
+            // how much of the frame was spent on non avatar related work?
+            U64 non_avatar_time_raw = tot_frame_time_raw - tot_avatar_time_raw;
+
+            // If the target frame time < scene time (estimated as non_avatar time)
+            U64 target_avatar_time_raw;
+            if(target_frame_time_raw < non_avatar_time_raw)
+            {
+                // we cannnot do this by avatar adjustment alone.
+                if((gFrameCount - LLPerfStats::lastGlobalPrefChange) > settingsChangeFrequency) // give  changes a short time to take effect.
+                {
+                    if(tunables.userFPSTuningStrategy != TUNE_AVATARS_ONLY)
+                    {
+                        // 1 - hack the water to opaque. all non opaque have a significant hit, this is a big boost for (arguably) a minor visual hit.
+                        // the other reflection options make comparatively little change and if this overshoots we'll be stepping back up later
+# if 0 // TODO RenderReflectionDetail went away
+                        if(LLPipeline::RenderReflectionDetail != -2)
+                        {
+                            LLPerfStats::tunables.updateReflectionDetail(-2);
+                            LLPerfStats::lastGlobalPrefChange = gFrameCount;
+                            return;
+                        }
+                        else // deliberately "else" here so we only do one of these in any given frame
+#endif
+                        {
+                            // step down the DD by 10m per update
+                            auto new_dd = (LLPipeline::RenderFarClip - DD_STEP > tunables.userMinDrawDistance)?(LLPipeline::RenderFarClip - DD_STEP) : tunables.userMinDrawDistance;
+                            if(new_dd != LLPipeline::RenderFarClip)
+                            {
+                                LLPerfStats::tunables.updateFarClip( new_dd );
+                                LLPerfStats::lastGlobalPrefChange = gFrameCount;
+                                return;
+                            }
+                        }
+                    }
+                    // if we reach here, we've no more changes to make to tune scenery so we'll resort to agressive Avatar tuning
+                    // Note: moved from outside "if changefrequency elapsed" to stop fallthrough and allow scenery changes time to take effect.
+                    target_avatar_time_raw = 0;
+                }
+                else 
+                {
+                    // we made a settings change recently so let's give it time.
+                    return;
+                }
+            }
+            else
+            {
+                // set desired avatar budget.
+                target_avatar_time_raw =  target_frame_time_raw - non_avatar_time_raw;
+            }
+
+            if ((target_avatar_time_raw < tot_avatar_time_raw) && (tunables.userFPSTuningStrategy != TUNE_SCENE_ONLY))
+            {
+                // we need to spend less time drawing avatars to meet our budget
+                auto new_render_limit_ns {LLPerfStats::raw_to_ns(av_render_max_raw)};
+                // max render this frame may be higher than the last (cos new entrants and jitter) so make sure we are heading in the right direction
+                if( new_render_limit_ns > renderAvatarMaxART_ns )
+                {
+                    new_render_limit_ns = renderAvatarMaxART_ns;
+                }
+                new_render_limit_ns -= LLPerfStats::ART_MIN_ADJUST_DOWN_NANOS;
+
+                // bounce at the bottom to prevent "no limit" 
+                new_render_limit_ns = std::max((U64)new_render_limit_ns, (U64)LLPerfStats::ART_MINIMUM_NANOS);
+
+                // assign the new value
+                if(renderAvatarMaxART_ns != new_render_limit_ns)
+                {
+                    renderAvatarMaxART_ns = new_render_limit_ns;
+                    tunables.updateSettingsFromRenderCostLimit();
+                }
+                // LL_DEBUGS() << "AUTO_TUNE: avatar_budget adjusted to:" << new_render_limit_ns << LL_ENDL;
+            }
+            // LL_DEBUGS() << "AUTO_TUNE: Target frame time:"<< LLPerfStats::raw_to_us(target_frame_time_raw) << "usecs (non_avatar is " << LLPerfStats::raw_to_us(non_avatar_time_raw) << "usecs) Max cost limited=" << renderAvatarMaxART_ns << LL_ENDL;
+        }
+        else if(( LLPerfStats::raw_to_ns(target_frame_time_raw) > (LLPerfStats::raw_to_ns(tot_frame_time_raw) + renderAvatarMaxART_ns) ) ||
+                 (tunables.vsyncEnabled && (target_fps == LLPerfStats::vsync_max_fps) && (target_frame_time_raw > getMeanTotalFrameTime())))
+        {
+            if(belowTargetFPS == true)
+            {
+                // we reached target, force a pause
+                lastGlobalPrefChange = gFrameCount;
+                belowTargetFPS = false;
+            }
+
+            // once we're over the FPS target we slow down further
+            if((gFrameCount - lastGlobalPrefChange) > settingsChangeFrequency*3)
+            {
+                if(!tunables.userAutoTuneLock)
+                {
+                    // we've reached the target and stayed long enough to consider stable.
+                    // turn off if we are not locked.
+                    tunables.updateUserAutoTuneEnabled(false);
+                }
+                if(renderAvatarMaxART_ns != 0 && LLPerfStats::tunedAvatars > 0 && (tunables.userFPSTuningStrategy != TUNE_SCENE_ONLY) )
+                {
+                    // if we have more time to spare let's shift up little in the hope we'll restore an avatar.
+                    U64 up_step = LLPerfStats::tunedAvatars > 2 ? LLPerfStats::ART_MIN_ADJUST_UP_NANOS : LLPerfStats::ART_MIN_ADJUST_UP_NANOS * 2;
+                    renderAvatarMaxART_ns += up_step;
+                    tunables.updateSettingsFromRenderCostLimit();
+                    return;
+                }
+                if(tunables.userFPSTuningStrategy != TUNE_AVATARS_ONLY)
+                {
+                    if( LLPipeline::RenderFarClip < tunables.userTargetDrawDistance ) 
+                    {
+                        LLPerfStats::tunables.updateFarClip( std::min(LLPipeline::RenderFarClip + DD_STEP, tunables.userTargetDrawDistance) );
+                        LLPerfStats::lastGlobalPrefChange = gFrameCount;
+                        return;
+                    }
+                    if( (tot_frame_time_raw * 1.5) < target_frame_time_raw )
+                    {
+                        // if everything else is "max" and we have >50% headroom let's knock the water quality up a notch at a time.
+# if 0 // RenderReflectionDetail went away
+                        LLPerfStats::tunables.updateReflectionDetail( std::min(LLPipeline::RenderReflectionDetail + 1, tunables.userTargetReflections) );
+#endif
+                    }
+                }
+            }
+        }
+   }
+}
diff --git a/indra/newview/llperfstats.h b/indra/newview/llperfstats.h
new file mode 100644
index 0000000000..dbb88a141d
--- /dev/null
+++ b/indra/newview/llperfstats.h
@@ -0,0 +1,459 @@
+/** 
+* @file llperfstats.h
+* @brief Statistics collection to support autotune and perf flaoter.
+*
+* $LicenseInfo:firstyear=2022&license=viewerlgpl$
+* Second Life Viewer Source Code
+* Copyright (C) 2022, Linden Research, Inc.
+* 
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU Lesser General Public
+* License as published by the Free Software Foundation;
+* version 2.1 of the License only.
+* 
+* This library is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+* Lesser General Public License for more details.
+* 
+* You should have received a copy of the GNU Lesser General Public
+* License along with this library; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+* 
+* Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+* $/LicenseInfo$
+*/
+#pragma once
+#ifndef LL_PERFSTATS_H_INCLUDED
+#define LL_PERFSTATS_H_INCLUDED
+
+#include <atomic>
+#include <chrono>
+#include <array>
+#include <unordered_map>
+#include <mutex>
+#include "lluuid.h"
+#include "llfasttimer.h"
+#include "llapp.h"
+#include "llprofiler.h"
+#include "pipeline.h"
+
+extern U32 gFrameCount;
+extern LLUUID gAgentID;
+namespace LLPerfStats
+{
+// Note if changing these, they should correspond with the log range of the correpsonding sliders
+    static constexpr U64 ART_UNLIMITED_NANOS{50000000};
+    static constexpr U64 ART_MINIMUM_NANOS{100000};
+    static constexpr U64 ART_MIN_ADJUST_UP_NANOS{5000};
+    static constexpr U64 ART_MIN_ADJUST_DOWN_NANOS{10000}; 
+
+    static constexpr F32 PREFERRED_DD{180};
+    static constexpr U32 SMOOTHING_PERIODS{50};
+    static constexpr U32 DD_STEP{10};
+
+    static constexpr U32 TUNE_AVATARS_ONLY{0};
+    static constexpr U32 TUNE_SCENE_AND_AVATARS{1};
+    static constexpr U32 TUNE_SCENE_ONLY{2};
+
+    extern F64 cpu_hertz;
+
+    extern std::atomic<int64_t> tunedAvatars;
+    extern std::atomic<U64> renderAvatarMaxART_ns;
+    extern bool belowTargetFPS;
+    extern U32 lastGlobalPrefChange;
+    extern U32 lastSleepedFrame;
+    extern U64 meanFrameTime;
+    extern std::mutex bufferToggleLock;
+
+    enum class ObjType_t{
+        OT_GENERAL=0, // Also Unknown. Used for n/a type stats such as scenery
+        OT_AVATAR,
+        OT_ATTACHMENT,
+        OT_HUD,
+        OT_COUNT
+    };
+    enum class StatType_t{
+        RENDER_GEOMETRY=0,
+        RENDER_SHADOWS,
+        RENDER_HUDS,
+        RENDER_UI,
+        RENDER_COMBINED,
+        RENDER_SWAP,
+        RENDER_FRAME,
+        RENDER_DISPLAY,
+        RENDER_SLEEP,
+        RENDER_LFS,
+        RENDER_MESHREPO,
+        //RENDER_FPSLIMIT,
+        RENDER_FPS,
+        RENDER_IDLE,
+        RENDER_DONE, // toggle buffer & clearbuffer (see processUpdate for hackery)
+        STATS_COUNT
+    };
+
+    struct StatsRecord
+    { 
+        StatType_t  statType;
+        ObjType_t   objType;
+        LLUUID      avID;
+        LLUUID      objID;
+        uint64_t    time;
+        bool        isRigged;
+        bool        isHUD;
+    };
+
+    struct Tunables
+    {
+        static constexpr U32 Nothing{0};
+        static constexpr U32 NonImpostors{1};
+        static constexpr U32 ReflectionDetail{2};
+        static constexpr U32 FarClip{4};
+        static constexpr U32 UserMinDrawDistance{8};
+        static constexpr U32 UserTargetDrawDistance{16};
+        static constexpr U32 UserImpostorDistance{32};
+        static constexpr U32 UserImpostorDistanceTuningEnabled{64};
+        static constexpr U32 UserFPSTuningStrategy{128};
+        static constexpr U32 UserAutoTuneEnabled{256};
+        static constexpr U32 UserTargetFPS{512};
+        static constexpr U32 UserARTCutoff{1024};
+        static constexpr U32 UserAutoTuneLock{4096};
+
+        U32 tuningFlag{0}; // bit mask for changed settings
+
+        // proxy variables, used to pas the new value to be set via the mainthread
+        U32 nonImpostors{0}; 
+        S32 reflectionDetail{0}; 
+        F32 farClip{0.0}; 
+        F32 userMinDrawDistance{0.0}; 
+        F32 userTargetDrawDistance{0.0};
+        F32 userImpostorDistance{0.0};
+        bool userImpostorDistanceTuningEnabled{false};
+        U32 userFPSTuningStrategy{0};
+        bool userAutoTuneEnabled{false};
+        bool userAutoTuneLock{true};
+        U32 userTargetFPS{0};
+        F32 userARTCutoffSliderValue{0};
+        S32 userTargetReflections{0};
+        bool autoTuneTimeout{true};
+        bool vsyncEnabled{true};
+
+        void updateNonImposters(U32 nv){nonImpostors=nv; tuningFlag |= NonImpostors;};
+        void updateReflectionDetail(S32 nv){reflectionDetail=nv; tuningFlag |= ReflectionDetail;};
+        void updateFarClip(F32 nv){farClip=nv; tuningFlag |= FarClip;};
+        void updateUserMinDrawDistance(F32 nv){userMinDrawDistance=nv; tuningFlag |= UserMinDrawDistance;};
+        void updateUserTargetDrawDistance(F32 nv){userTargetDrawDistance=nv; tuningFlag |= UserTargetDrawDistance;};
+        void updateImposterDistance(F32 nv){userImpostorDistance=nv; tuningFlag |= UserImpostorDistance;};
+        void updateImposterDistanceTuningEnabled(bool nv){userImpostorDistanceTuningEnabled=nv; tuningFlag |= UserImpostorDistanceTuningEnabled;};
+        void updateUserFPSTuningStrategy(U32 nv){userFPSTuningStrategy=nv; tuningFlag |= UserFPSTuningStrategy;};
+        void updateTargetFps(U32 nv){userTargetFPS=nv; tuningFlag |= UserTargetFPS;};
+        void updateUserARTCutoffSlider(F32 nv){userARTCutoffSliderValue=nv; tuningFlag |= UserARTCutoff;};
+        void updateUserAutoTuneEnabled(bool nv){userAutoTuneEnabled=nv; tuningFlag |= UserAutoTuneEnabled;};
+        void updateUserAutoTuneLock(bool nv){userAutoTuneLock=nv; tuningFlag |= UserAutoTuneLock;};
+
+        void resetChanges(){tuningFlag=Nothing;};
+        void initialiseFromSettings();
+        void updateRenderCostLimitFromSettings();
+        void updateSettingsFromRenderCostLimit();
+        void applyUpdates();
+    };
+
+    extern Tunables tunables;
+
+    class StatsRecorder{
+        using Queue = LLThreadSafeQueue<StatsRecord>;
+    public:
+
+        static inline StatsRecorder& getInstance()
+        {
+            static StatsRecorder instance;
+            return instance;
+        }
+        static inline void setFocusAv(const LLUUID& avID){focusAv = avID;};
+        static inline const LLUUID& getFocusAv(){return focusAv;};
+        static inline void setAutotuneInit(){autotuneInit = true;};
+        static inline void send(StatsRecord && upd){StatsRecorder::getInstance().q.pushFront(std::move(upd));};
+        static void endFrame(){StatsRecorder::getInstance().q.pushFront(StatsRecord{StatType_t::RENDER_DONE, ObjType_t::OT_GENERAL, LLUUID::null, LLUUID::null, 0});};
+        static void clearStats(){StatsRecorder::getInstance().q.pushFront(StatsRecord{StatType_t::RENDER_DONE, ObjType_t::OT_GENERAL, LLUUID::null, LLUUID::null, 1});};
+
+        static inline void setEnabled(bool on_or_off){collectionEnabled=on_or_off;};
+        static inline void enable()     { collectionEnabled=true; };
+        static inline void disable()    { collectionEnabled=false; };
+        static inline bool enabled()    { return collectionEnabled; };
+
+        static inline int getReadBufferIndex() { return (writeBuffer ^ 1); };
+        // static inline const StatsTypeMatrix& getCurrentStatsMatrix(){ return statsDoubleBuffer[getReadBufferIndex()];}
+        static inline uint64_t get(ObjType_t otype, LLUUID id, StatType_t type)
+        {
+            return statsDoubleBuffer[getReadBufferIndex()][static_cast<size_t>(otype)][id][static_cast<size_t>(type)];
+        }
+        static inline uint64_t getSceneStat(StatType_t type)
+        {
+            return statsDoubleBuffer[getReadBufferIndex()][static_cast<size_t>(ObjType_t::OT_GENERAL)][LLUUID::null][static_cast<size_t>(type)];
+        }
+
+        static inline uint64_t getSum(ObjType_t otype, StatType_t type)
+        {
+            return sum[getReadBufferIndex()][static_cast<size_t>(otype)][static_cast<size_t>(type)];
+        }
+        static inline uint64_t getMax(ObjType_t otype, StatType_t type)
+        {
+            return max[getReadBufferIndex()][static_cast<size_t>(otype)][static_cast<size_t>(type)];
+        }
+        static void updateAvatarParams();
+    private:
+        StatsRecorder();
+
+        static int countNearbyAvatars(S32 distance);
+        static U64 getMeanTotalFrameTime();
+        static void updateMeanFrameTime(U64 tot_frame_time_raw);
+// StatsArray is a uint64_t for each possible statistic type.
+        using StatsArray    = std::array<uint64_t, static_cast<size_t>(LLPerfStats::StatType_t::STATS_COUNT)>;
+        using StatsMap      = std::unordered_map<LLUUID, StatsArray, boost::hash<LLUUID>>;
+        using StatsTypeMatrix = std::array<StatsMap, static_cast<size_t>(LLPerfStats::ObjType_t::OT_COUNT)>;
+        using StatsSummaryArray = std::array<StatsArray, static_cast<size_t>(LLPerfStats::ObjType_t::OT_COUNT)>;
+
+        static std::atomic<int> writeBuffer;
+        static LLUUID focusAv;
+        static bool autotuneInit;
+        static std::array<StatsTypeMatrix,2> statsDoubleBuffer;
+        static std::array<StatsSummaryArray,2> max;
+        static std::array<StatsSummaryArray,2> sum;
+        static bool collectionEnabled;
+
+
+        void processUpdate(const StatsRecord& upd) const
+        {
+            LL_PROFILE_ZONE_SCOPED_CATEGORY_STATS;
+            // LL_INFOS("perfstats") << "processing update:" << LL_ENDL;
+            // Note: nullptr is used as the key for global stats
+
+            if (upd.statType == StatType_t::RENDER_DONE && upd.objType == ObjType_t::OT_GENERAL && upd.time == 0)
+            {
+                // LL_INFOS("perfstats") << "End of Frame Toggle Buffer:" << gFrameCount << LL_ENDL;
+                toggleBuffer();
+                return;
+            }
+            if (upd.statType == StatType_t::RENDER_DONE && upd.objType == ObjType_t::OT_GENERAL && upd.time == 1)
+            {
+                // LL_INFOS("perfstats") << "New region - clear buffers:" << gFrameCount << LL_ENDL;
+                clearStatsBuffers();
+                return;
+            }
+
+            auto ot{upd.objType};
+            auto& key{upd.objID};
+            auto& avKey{upd.avID};
+            auto type {upd.statType};
+            auto val {upd.time};
+
+            if (ot == ObjType_t::OT_GENERAL)
+            {
+                // LL_INFOS("perfstats") << "General update:" << LL_ENDL;
+                doUpd(key, ot, type,val);
+                return;
+            }
+
+            if (ot == ObjType_t::OT_AVATAR)
+            {
+                // LL_INFOS("perfstats") << "Avatar update:" << LL_ENDL;
+                doUpd(avKey, ot, type, val);
+                return;
+            }
+
+            if (ot == ObjType_t::OT_ATTACHMENT)
+            {
+                if( !upd.isHUD ) // don't include HUD cost in self.
+                {
+                    LL_PROFILE_ZONE_NAMED("Att as Av")
+                    // For all attachments that are not rigged we add them to the avatar (for all avatars) cost.
+                    doUpd(avKey, ObjType_t::OT_AVATAR, type, val);
+                }
+                if( avKey == focusAv )
+                {
+                    LL_PROFILE_ZONE_NAMED("Att as Att")
+                // For attachments that are for the focusAv (self for now) we record them for the attachment/complexity view
+                    if(upd.isHUD)
+                    {
+                        ot = ObjType_t::OT_HUD;
+                    }
+                    // LL_INFOS("perfstats") << "frame: " << gFrameCount << " Attachment update("<< (type==StatType_t::RENDER_GEOMETRY?"GEOMETRY":"SHADOW") << ": " << key.asString() << " = " << val << LL_ENDL;
+                    doUpd(key, ot, type, val);
+                }
+                // else
+                // {
+                //     // LL_INFOS("perfstats") << "frame: " << gFrameCount << " non-self Att update("<< (type==StatType_t::RENDER_GEOMETRY?"GEOMETRY":"SHADOW") << ": " << key.asString() << " = " << val << " for av " << avKey.asString() << LL_ENDL;
+                // }
+            }
+        }
+
+        static inline void doUpd(const LLUUID& key, ObjType_t ot, StatType_t type, uint64_t val)
+        {
+            LL_PROFILE_ZONE_SCOPED_CATEGORY_STATS;
+            using ST = StatType_t;
+            StatsMap& stm {statsDoubleBuffer[writeBuffer][static_cast<size_t>(ot)]};
+            auto& thisAsset = stm[key];
+
+            thisAsset[static_cast<size_t>(type)] += val;
+            thisAsset[static_cast<size_t>(ST::RENDER_COMBINED)] += val;
+
+            sum[writeBuffer][static_cast<size_t>(ot)][static_cast<size_t>(type)] += val;
+            sum[writeBuffer][static_cast<size_t>(ot)][static_cast<size_t>(ST::RENDER_COMBINED)] += val;
+
+            if(max[writeBuffer][static_cast<size_t>(ot)][static_cast<size_t>(type)] < thisAsset[static_cast<size_t>(type)])
+            {
+                max[writeBuffer][static_cast<size_t>(ot)][static_cast<size_t>(type)] = thisAsset[static_cast<size_t>(type)];
+            }
+            if(max[writeBuffer][static_cast<size_t>(ot)][static_cast<size_t>(ST::RENDER_COMBINED)] < thisAsset[static_cast<size_t>(ST::RENDER_COMBINED)])
+            {
+                max[writeBuffer][static_cast<size_t>(ot)][static_cast<size_t>(ST::RENDER_COMBINED)] = thisAsset[static_cast<size_t>(ST::RENDER_COMBINED)];
+            }
+        }
+
+        static void toggleBuffer();
+        static void clearStatsBuffers();
+
+        // thread entry
+        static void run()
+        {
+            StatsRecord upd[10];
+            auto & instance {StatsRecorder::getInstance()};
+            LL_PROFILER_SET_THREAD_NAME("PerfStats");
+
+            while( enabled() && !LLApp::isExiting() )
+            {
+                auto count = 0;
+                while (count < 10)
+                {
+                    if (instance.q.tryPopFor(std::chrono::milliseconds(10), upd[count]))
+                    {
+                        count++;
+                    }
+                    else
+                    {
+                        break;
+                    }
+                }
+                //LL_PROFILER_THREAD_BEGIN("PerfStats");
+                if(count)
+                {
+                    // LL_INFOS("perfstats") << "processing " << count << " updates." << LL_ENDL;
+                    for(auto i =0; i < count; i++)
+                    {
+                        instance.processUpdate(upd[i]);
+                    }
+                }
+                //LL_PROFILER_THREAD_END("PerfStats");
+            }
+        }
+
+        Queue q;
+        std::thread t;
+
+        ~StatsRecorder() = default;
+        StatsRecorder(const StatsRecorder&) = delete;
+        StatsRecorder& operator=(const StatsRecorder&) = delete;
+
+    };
+
+    template <enum ObjType_t ObjTypeDiscriminator>
+    class RecordTime
+    {
+
+    private:
+        RecordTime(const RecordTime&) = delete;
+        RecordTime() = delete;
+        U64 start;
+    public:
+        StatsRecord stat;
+
+        RecordTime( const LLUUID& av, const LLUUID& id, StatType_t type, bool isRiggedAtt=false, bool isHUDAtt=false):
+                    start{LLTrace::BlockTimer::getCPUClockCount64()},
+                    stat{type, ObjTypeDiscriminator, std::move(av), std::move(id), 0, isRiggedAtt, isHUDAtt}
+        {
+            //LL_PROFILE_ZONE_COLOR(tracy::Color::Orange);
+        };
+
+        template < ObjType_t OD = ObjTypeDiscriminator,
+                   std::enable_if_t<OD == ObjType_t::OT_GENERAL> * = nullptr>
+        explicit RecordTime( StatType_t type ):RecordTime<ObjTypeDiscriminator>(LLUUID::null, LLUUID::null, type )
+        {
+            LL_PROFILE_ZONE_SCOPED_CATEGORY_STATS;
+        };
+
+        template < ObjType_t OD = ObjTypeDiscriminator,
+                   std::enable_if_t<OD == ObjType_t::OT_AVATAR> * = nullptr>
+        RecordTime( const LLUUID & av, StatType_t type ):RecordTime<ObjTypeDiscriminator>(std::move(av), LLUUID::null, type)
+        {
+            //LL_PROFILE_ZONE_COLOR(tracy::Color::Purple);
+        };
+
+        ~RecordTime()
+        { 
+            if(!LLPerfStats::StatsRecorder::enabled())
+            {
+                return;
+            }
+
+            //LL_PROFILE_ZONE_COLOR(tracy::Color::Red);
+
+            stat.time = LLTrace::BlockTimer::getCPUClockCount64() - start;
+            StatsRecorder::send(std::move(stat));
+        };
+    };
+
+    
+    inline double raw_to_ns(U64 raw)    { return (static_cast<double>(raw) * 1000000000.0) / LLPerfStats::cpu_hertz; };
+    inline double raw_to_us(U64 raw)    { return (static_cast<double>(raw) *    1000000.0) / LLPerfStats::cpu_hertz; };
+    inline double raw_to_ms(U64 raw)    { return (static_cast<double>(raw) *       1000.0) / LLPerfStats::cpu_hertz; };
+
+    using RecordSceneTime = RecordTime<ObjType_t::OT_GENERAL>;
+    using RecordAvatarTime = RecordTime<ObjType_t::OT_AVATAR>;
+    using RecordAttachmentTime = RecordTime<ObjType_t::OT_ATTACHMENT>;
+    using RecordHudAttachmentTime = RecordTime<ObjType_t::OT_HUD>;
+     
+};// namespace LLPerfStats
+
+// helper functions
+using RATptr = std::unique_ptr<LLPerfStats::RecordAttachmentTime>;
+using RSTptr = std::unique_ptr<LLPerfStats::RecordSceneTime>;
+
+template <typename T>
+static inline void trackAttachments(const T * vobj, bool isRigged, RATptr* ratPtrp)
+{
+    if( !vobj ){ ratPtrp->reset(); return;};
+    
+    const T* rootAtt{vobj};
+    if (rootAtt->isAttachment())
+    {
+        LL_PROFILE_ZONE_SCOPED_CATEGORY_STATS;
+
+        while( !rootAtt->isRootEdit() )
+        {
+            rootAtt = (T*)(rootAtt->getParent());
+        }
+
+        auto avPtr = (T*)(rootAtt->getParent()); 
+        if(!avPtr){ratPtrp->reset(); return;}
+
+        auto& av = avPtr->getID();
+        auto& obj = rootAtt->getAttachmentItemID();
+        if (!*ratPtrp || (*ratPtrp)->stat.objID != obj || (*ratPtrp)->stat.avID != av)
+        {
+            if (*ratPtrp)
+            {
+                // deliberately reset to ensure destruction before construction of replacement.
+                ratPtrp->reset();
+            };
+            *ratPtrp = std::make_unique<LLPerfStats::RecordAttachmentTime>( 
+                av, 
+                obj,
+                ( LLPipeline::sShadowRender?LLPerfStats::StatType_t::RENDER_SHADOWS : LLPerfStats::StatType_t::RENDER_GEOMETRY ), 
+                isRigged, 
+                rootAtt->isHUDAttachment());
+        }
+    }
+    return;
+};
+
+#endif
diff --git a/indra/newview/llstartup.cpp b/indra/newview/llstartup.cpp
index 6bcee31b72..65fdd400bf 100644
--- a/indra/newview/llstartup.cpp
+++ b/indra/newview/llstartup.cpp
@@ -208,6 +208,7 @@
 #include "llstacktrace.h"
 
 #include "threadpool.h"
+#include "llperfstats.h"
 
 
 #if LL_WINDOWS
@@ -1502,6 +1503,8 @@ bool idle_startup()
 			LLViewerParcelAskPlay::getInstance()->loadSettings();
 		}
 
+		gAgent.addRegionChangedCallback(boost::bind(&LLPerfStats::StatsRecorder::clearStats));
+
 		// *Note: this is where gWorldMap used to be initialized.
 
 		// register null callbacks for audio until the audio system is initialized
@@ -2346,6 +2349,8 @@ bool idle_startup()
 
 		LLUIUsage::instance().clear();
 
+        LLPerfStats::StatsRecorder::setAutotuneInit();
+
 		return TRUE;
 	}
 
@@ -3408,6 +3413,9 @@ bool process_login_success_response()
 	if(!text.empty()) gAgentID.set(text);
 	gDebugInfo["AgentID"] = text;
 	
+	LLPerfStats::StatsRecorder::setEnabled(gSavedSettings.getBOOL("PerfStatsCaptureEnabled"));
+	LLPerfStats::StatsRecorder::setFocusAv(gAgentID);
+
 	// Agent id needed for parcel info request in LLUrlEntryParcel
 	// to resolve parcel name.
 	LLUrlEntryParcel::setAgentID(gAgentID);
diff --git a/indra/newview/lltoolbarview.cpp b/indra/newview/lltoolbarview.cpp
index 01d799dcd5..4f47c465c4 100644
--- a/indra/newview/lltoolbarview.cpp
+++ b/indra/newview/lltoolbarview.cpp
@@ -44,6 +44,7 @@
 #include "llagent.h"  // HACK for destinations guide on startup
 #include "llfloaterreg.h"  // HACK for destinations guide on startup
 #include "llviewercontrol.h"  // HACK for destinations guide on startup
+#include "llinventorymodel.h" // HACK to disable starter avatars button for NUX
 
 #include <boost/foreach.hpp>
 
@@ -319,6 +320,25 @@ bool LLToolBarView::loadToolbars(bool force_default)
 			}
 		}
 	}
+
+    // SL-18581: Don't show the starter avatar toolbar button for NUX users
+    LLViewerInventoryCategory* my_outfits_cat = gInventory.getCategory(gInventory.findCategoryUUIDForType(LLFolderType::FT_MY_OUTFITS));
+    if (gAgent.isFirstLogin())
+    {
+        LL_WARNS() << "First login: checking for NUX user." << LL_ENDL;
+        if (my_outfits_cat != NULL && my_outfits_cat->getDescendentCount() > 0)
+        {
+            LL_WARNS() << "First login: My Outfits folder is not empty, removing the avatar picker button." << LL_ENDL;
+            for (S32 i = LLToolBarEnums::TOOLBAR_FIRST; i <= LLToolBarEnums::TOOLBAR_LAST; i++)
+            {
+                if (mToolbars[i])
+                {
+                    mToolbars[i]->removeCommand(LLCommandId("avatar"));
+                }
+            }
+        }
+    }
+
 	mToolbarsLoaded = true;
 	return true;
 }
diff --git a/indra/newview/llviewercontrol.cpp b/indra/newview/llviewercontrol.cpp
index bbdae95b7f..faeebc33ee 100644
--- a/indra/newview/llviewercontrol.cpp
+++ b/indra/newview/llviewercontrol.cpp
@@ -74,6 +74,7 @@
 #include "llspellcheck.h"
 #include "llslurl.h"
 #include "llstartup.h"
+#include "llperfstats.h"
 
 // Third party library includes
 #include <boost/algorithm/string.hpp>
@@ -247,8 +248,15 @@ static bool handleAnisotropicChanged(const LLSD& newvalue)
 
 static bool handleVSyncChanged(const LLSD& newvalue)
 {
+    LLPerfStats::tunables.vsyncEnabled = newvalue.asBoolean();
     gViewerWindow->getWindow()->toggleVSync(newvalue.asBoolean());
 
+    if(newvalue.asBoolean() == true)
+    {
+        U32 current_target = gSavedSettings.getU32("TargetFPS");
+        gSavedSettings.setU32("TargetFPS", std::min((U32)gViewerWindow->getWindow()->getRefreshRate(), current_target));
+    }
+
     return true;
 }
 
@@ -585,6 +593,71 @@ bool toggle_show_object_render_cost(const LLSD& newvalue)
 }
 
 void handleRenderAutoMuteByteLimitChanged(const LLSD& new_value);
+
+void handleTargetFPSChanged(const LLSD& newValue)
+{
+    const auto targetFPS = gSavedSettings.getU32("TargetFPS");
+
+    U32 frame_rate_limit = gViewerWindow->getWindow()->getRefreshRate();
+    if(LLPerfStats::tunables.vsyncEnabled && (targetFPS > frame_rate_limit))
+    {
+        gSavedSettings.setU32("TargetFPS", std::min(frame_rate_limit, targetFPS));
+    }
+    else
+    {
+        LLPerfStats::tunables.userTargetFPS = targetFPS;
+    }
+}
+
+void handleAutoTuneLockChanged(const LLSD& newValue)
+{
+    const auto newval = gSavedSettings.getBOOL("AutoTuneLock");
+    LLPerfStats::tunables.userAutoTuneLock = newval;
+
+    gSavedSettings.setBOOL("AutoTuneFPS", newval);
+}
+
+void handleAutoTuneFPSChanged(const LLSD& newValue)
+{
+    const auto newval = gSavedSettings.getBOOL("AutoTuneFPS");
+    LLPerfStats::tunables.userAutoTuneEnabled = newval;
+    if(newval && LLPerfStats::renderAvatarMaxART_ns == 0) // If we've enabled autotune we override "unlimited" to max
+    {
+        gSavedSettings.setF32("RenderAvatarMaxART",log10(LLPerfStats::ART_UNLIMITED_NANOS-1000));//triggers callback to update static var
+    }
+}
+
+void handleRenderAvatarMaxARTChanged(const LLSD& newValue)
+{
+    LLPerfStats::tunables.updateRenderCostLimitFromSettings();
+}
+
+void handleUserTargetDrawDistanceChanged(const LLSD& newValue)
+{
+    const auto newval = gSavedSettings.getF32("AutoTuneRenderFarClipTarget");
+    LLPerfStats::tunables.userTargetDrawDistance = newval;
+}
+
+void handlePerformanceStatsEnabledChanged(const LLSD& newValue)
+{
+    const auto newval = gSavedSettings.getBOOL("PerfStatsCaptureEnabled");
+    LLPerfStats::StatsRecorder::setEnabled(newval);
+}
+void handleUserImpostorByDistEnabledChanged(const LLSD& newValue)
+{
+    const auto newval = gSavedSettings.getBOOL("AutoTuneImpostorByDistEnabled");
+    LLPerfStats::tunables.userImpostorDistanceTuningEnabled = newval;
+}
+void handleUserImpostorDistanceChanged(const LLSD& newValue)
+{
+    const auto newval = gSavedSettings.getF32("AutoTuneImpostorFarAwayDistance");
+    LLPerfStats::tunables.userImpostorDistance = newval;
+}
+void handleFPSTuningStrategyChanged(const LLSD& newValue)
+{
+    const auto newval = gSavedSettings.getU32("TuningFPSStrategy");
+    LLPerfStats::tunables.userFPSTuningStrategy = newval;
+}
 ////////////////////////////////////////////////////////////////////////////
 
 LLPointer<LLControlVariable> setting_get_control(LLControlGroup& group, const std::string& setting)
@@ -618,142 +691,152 @@ void setting_setup_signal_listener(LLControlGroup& group, const std::string& set
 void settings_setup_listeners()
 {
     setting_setup_signal_listener(gSavedSettings, "FirstPersonAvatarVisible", handleRenderAvatarMouselookChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderFarClip", handleRenderFarClipChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderTerrainDetail", handleTerrainDetailChanged);
-	setting_setup_signal_listener(gSavedSettings, "OctreeStaticObjectSizeFactor", handleRepartition);
-	setting_setup_signal_listener(gSavedSettings, "OctreeDistanceFactor", handleRepartition);
-	setting_setup_signal_listener(gSavedSettings, "OctreeMaxNodeCapacity", handleRepartition);
-	setting_setup_signal_listener(gSavedSettings, "OctreeAlphaDistanceFactor", handleRepartition);
-	setting_setup_signal_listener(gSavedSettings, "OctreeAttachmentSizeFactor", handleRepartition);
-	setting_setup_signal_listener(gSavedSettings, "RenderMaxTextureIndex", handleSetShaderChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderUIBuffer", handleWindowResized);
-	setting_setup_signal_listener(gSavedSettings, "RenderDepthOfField", handleReleaseGLBufferChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderFSAASamples", handleReleaseGLBufferChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderSpecularResX", handleLUTBufferChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderSpecularResY", handleLUTBufferChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderSpecularExponent", handleLUTBufferChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderAnisotropic", handleAnisotropicChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderShadowResolutionScale", handleShadowsResized);
-	setting_setup_signal_listener(gSavedSettings, "RenderGlow", handleReleaseGLBufferChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderGlow", handleSetShaderChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderGlowResolutionPow", handleReleaseGLBufferChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderGammaFull", handleSetShaderChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderVolumeLODFactor", handleVolumeLODChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderAvatarLODFactor", handleAvatarLODChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderAvatarPhysicsLODFactor", handleAvatarPhysicsLODChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderTerrainLODFactor", handleTerrainLODChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderTreeLODFactor", handleTreeLODChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderFlexTimeFactor", handleFlexLODChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderGamma", handleGammaChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderFogRatio", handleFogRatioChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderMaxPartCount", handleMaxPartCountChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderDynamicLOD", handleRenderDynamicLODChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderLocalLights", handleRenderLocalLightsChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderFarClip", handleRenderFarClipChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderTerrainDetail", handleTerrainDetailChanged);
+    setting_setup_signal_listener(gSavedSettings, "OctreeStaticObjectSizeFactor", handleRepartition);
+    setting_setup_signal_listener(gSavedSettings, "OctreeDistanceFactor", handleRepartition);
+    setting_setup_signal_listener(gSavedSettings, "OctreeMaxNodeCapacity", handleRepartition);
+    setting_setup_signal_listener(gSavedSettings, "OctreeAlphaDistanceFactor", handleRepartition);
+    setting_setup_signal_listener(gSavedSettings, "OctreeAttachmentSizeFactor", handleRepartition);
+    setting_setup_signal_listener(gSavedSettings, "RenderMaxTextureIndex", handleSetShaderChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderUIBuffer", handleWindowResized);
+    setting_setup_signal_listener(gSavedSettings, "RenderDepthOfField", handleReleaseGLBufferChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderFSAASamples", handleReleaseGLBufferChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderSpecularResX", handleLUTBufferChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderSpecularResY", handleLUTBufferChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderSpecularExponent", handleLUTBufferChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderAnisotropic", handleAnisotropicChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderShadowResolutionScale", handleShadowsResized);
+    setting_setup_signal_listener(gSavedSettings, "RenderGlow", handleReleaseGLBufferChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderGlow", handleSetShaderChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderGlowResolutionPow", handleReleaseGLBufferChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderGammaFull", handleSetShaderChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderVolumeLODFactor", handleVolumeLODChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderAvatarLODFactor", handleAvatarLODChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderAvatarPhysicsLODFactor", handleAvatarPhysicsLODChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderTerrainLODFactor", handleTerrainLODChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderTreeLODFactor", handleTreeLODChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderFlexTimeFactor", handleFlexLODChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderGamma", handleGammaChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderFogRatio", handleFogRatioChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderMaxPartCount", handleMaxPartCountChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderDynamicLOD", handleRenderDynamicLODChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderLocalLights", handleRenderLocalLightsChanged);
 	setting_setup_signal_listener(gSavedSettings, "RenderVSyncEnable", handleVSyncChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderDeferredNoise", handleReleaseGLBufferChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderDebugPipeline", handleRenderDebugPipelineChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderResolutionDivisor", handleRenderResolutionDivisorChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderDeferredNoise", handleReleaseGLBufferChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderDebugPipeline", handleRenderDebugPipelineChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderResolutionDivisor", handleRenderResolutionDivisorChanged);
     setting_setup_signal_listener(gSavedSettings, "RenderReflectionProbeLevel", handleReflectionProbeDetailChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderReflectionProbeDetail", handleReflectionProbeDetailChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderReflectionProbeDetail", handleReflectionProbeDetailChanged);
     setting_setup_signal_listener(gSavedSettings, "RenderReflectionsEnabled", handleReflectionProbeDetailChanged);
     setting_setup_signal_listener(gSavedSettings, "RenderScreenSpaceReflections", handleReflectionProbeDetailChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderShadowDetail", handleSetShaderChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderDeferredSSAO", handleSetShaderChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderPerformanceTest", handleRenderPerfTestChanged);
-	setting_setup_signal_listener(gSavedSettings, "ChatFontSize", handleChatFontSizeChanged);
-	setting_setup_signal_listener(gSavedSettings, "ChatPersistTime", handleChatPersistTimeChanged);
-	setting_setup_signal_listener(gSavedSettings, "ConsoleMaxLines", handleConsoleMaxLinesChanged);
-	setting_setup_signal_listener(gSavedSettings, "UploadBakedTexOld", handleUploadBakedTexOldChanged);
-	setting_setup_signal_listener(gSavedSettings, "UseOcclusion", handleUseOcclusionChanged);
-	setting_setup_signal_listener(gSavedSettings, "AudioLevelMaster", handleAudioVolumeChanged);
-	setting_setup_signal_listener(gSavedSettings, "AudioLevelSFX", handleAudioVolumeChanged);
-	setting_setup_signal_listener(gSavedSettings, "AudioLevelUI", handleAudioVolumeChanged);
-	setting_setup_signal_listener(gSavedSettings, "AudioLevelAmbient", handleAudioVolumeChanged);
-	setting_setup_signal_listener(gSavedSettings, "AudioLevelMusic", handleAudioVolumeChanged);
-	setting_setup_signal_listener(gSavedSettings, "AudioLevelMedia", handleAudioVolumeChanged);
-	setting_setup_signal_listener(gSavedSettings, "AudioLevelVoice", handleAudioVolumeChanged);
-	setting_setup_signal_listener(gSavedSettings, "AudioLevelDoppler", handleAudioVolumeChanged);
-	setting_setup_signal_listener(gSavedSettings, "AudioLevelRolloff", handleAudioVolumeChanged);
-	setting_setup_signal_listener(gSavedSettings, "AudioLevelUnderwaterRolloff", handleAudioVolumeChanged);
-	setting_setup_signal_listener(gSavedSettings, "MuteAudio", handleAudioVolumeChanged);
-	setting_setup_signal_listener(gSavedSettings, "MuteMusic", handleAudioVolumeChanged);
-	setting_setup_signal_listener(gSavedSettings, "MuteMedia", handleAudioVolumeChanged);
-	setting_setup_signal_listener(gSavedSettings, "MuteVoice", handleAudioVolumeChanged);
-	setting_setup_signal_listener(gSavedSettings, "MuteAmbient", handleAudioVolumeChanged);
-	setting_setup_signal_listener(gSavedSettings, "MuteUI", handleAudioVolumeChanged);
-	setting_setup_signal_listener(gSavedSettings, "WLSkyDetail", handleWLSkyDetailChanged);
-	setting_setup_signal_listener(gSavedSettings, "JoystickAxis0", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "JoystickAxis1", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "JoystickAxis2", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "JoystickAxis3", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "JoystickAxis4", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "JoystickAxis5", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "JoystickAxis6", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "FlycamAxisScale0", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "FlycamAxisScale1", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "FlycamAxisScale2", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "FlycamAxisScale3", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "FlycamAxisScale4", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "FlycamAxisScale5", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "FlycamAxisScale6", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "FlycamAxisDeadZone0", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "FlycamAxisDeadZone1", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "FlycamAxisDeadZone2", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "FlycamAxisDeadZone3", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "FlycamAxisDeadZone4", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "FlycamAxisDeadZone5", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "FlycamAxisDeadZone6", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "AvatarAxisScale0", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "AvatarAxisScale1", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "AvatarAxisScale2", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "AvatarAxisScale3", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "AvatarAxisScale4", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "AvatarAxisScale5", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "AvatarAxisDeadZone0", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "AvatarAxisDeadZone1", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "AvatarAxisDeadZone2", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "AvatarAxisDeadZone3", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "AvatarAxisDeadZone4", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "AvatarAxisDeadZone5", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "BuildAxisScale0", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "BuildAxisScale1", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "BuildAxisScale2", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "BuildAxisScale3", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "BuildAxisScale4", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "BuildAxisScale5", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "BuildAxisDeadZone0", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "BuildAxisDeadZone1", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "BuildAxisDeadZone2", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "BuildAxisDeadZone3", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "BuildAxisDeadZone4", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "BuildAxisDeadZone5", handleJoystickChanged);
-	setting_setup_signal_listener(gSavedSettings, "DebugViews", handleDebugViewsChanged);
-	setting_setup_signal_listener(gSavedSettings, "UserLogFile", handleLogFileChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderHideGroupTitle", handleHideGroupTitleChanged);
-	setting_setup_signal_listener(gSavedSettings, "HighResSnapshot", handleHighResSnapshotChanged);
-	setting_setup_signal_listener(gSavedSettings, "EnableVoiceChat", handleVoiceClientPrefsChanged);
-	setting_setup_signal_listener(gSavedSettings, "PTTCurrentlyEnabled", handleVoiceClientPrefsChanged);
-	setting_setup_signal_listener(gSavedSettings, "PushToTalkButton", handleVoiceClientPrefsChanged);
-	setting_setup_signal_listener(gSavedSettings, "PushToTalkToggle", handleVoiceClientPrefsChanged);
-	setting_setup_signal_listener(gSavedSettings, "VoiceEarLocation", handleVoiceClientPrefsChanged);
-	setting_setup_signal_listener(gSavedSettings, "VoiceInputAudioDevice", handleVoiceClientPrefsChanged);
-	setting_setup_signal_listener(gSavedSettings, "VoiceOutputAudioDevice", handleVoiceClientPrefsChanged);
-	setting_setup_signal_listener(gSavedSettings, "AudioLevelMic", handleVoiceClientPrefsChanged);
-	setting_setup_signal_listener(gSavedSettings, "LipSyncEnabled", handleVoiceClientPrefsChanged);	
-	setting_setup_signal_listener(gSavedSettings, "VelocityInterpolate", handleVelocityInterpolate);
-	setting_setup_signal_listener(gSavedSettings, "QAMode", show_debug_menus);
-	setting_setup_signal_listener(gSavedSettings, "UseDebugMenus", show_debug_menus);
-	setting_setup_signal_listener(gSavedSettings, "AgentPause", toggle_agent_pause);
-	setting_setup_signal_listener(gSavedSettings, "ShowNavbarNavigationPanel", toggle_show_navigation_panel);
-	setting_setup_signal_listener(gSavedSettings, "ShowMiniLocationPanel", toggle_show_mini_location_panel);
-	setting_setup_signal_listener(gSavedSettings, "ShowObjectRenderingCost", toggle_show_object_render_cost);
-	setting_setup_signal_listener(gSavedSettings, "ForceShowGrid", handleForceShowGrid);
-	setting_setup_signal_listener(gSavedSettings, "RenderTransparentWater", handleRenderTransparentWaterChanged);
-	setting_setup_signal_listener(gSavedSettings, "SpellCheck", handleSpellCheckChanged);
-	setting_setup_signal_listener(gSavedSettings, "SpellCheckDictionary", handleSpellCheckChanged);
-	setting_setup_signal_listener(gSavedSettings, "LoginLocation", handleLoginLocationChanged);
-	setting_setup_signal_listener(gSavedSettings, "DebugAvatarJoints", handleDebugAvatarJointsChanged);
-	setting_setup_signal_listener(gSavedSettings, "RenderAutoMuteByteLimit", handleRenderAutoMuteByteLimitChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderShadowDetail", handleSetShaderChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderDeferredSSAO", handleSetShaderChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderPerformanceTest", handleRenderPerfTestChanged);
+    setting_setup_signal_listener(gSavedSettings, "ChatFontSize", handleChatFontSizeChanged);
+    setting_setup_signal_listener(gSavedSettings, "ChatPersistTime", handleChatPersistTimeChanged);
+    setting_setup_signal_listener(gSavedSettings, "ConsoleMaxLines", handleConsoleMaxLinesChanged);
+    setting_setup_signal_listener(gSavedSettings, "UploadBakedTexOld", handleUploadBakedTexOldChanged);
+    setting_setup_signal_listener(gSavedSettings, "UseOcclusion", handleUseOcclusionChanged);
+    setting_setup_signal_listener(gSavedSettings, "AudioLevelMaster", handleAudioVolumeChanged);
+    setting_setup_signal_listener(gSavedSettings, "AudioLevelSFX", handleAudioVolumeChanged);
+    setting_setup_signal_listener(gSavedSettings, "AudioLevelUI", handleAudioVolumeChanged);
+    setting_setup_signal_listener(gSavedSettings, "AudioLevelAmbient", handleAudioVolumeChanged);
+    setting_setup_signal_listener(gSavedSettings, "AudioLevelMusic", handleAudioVolumeChanged);
+    setting_setup_signal_listener(gSavedSettings, "AudioLevelMedia", handleAudioVolumeChanged);
+    setting_setup_signal_listener(gSavedSettings, "AudioLevelVoice", handleAudioVolumeChanged);
+    setting_setup_signal_listener(gSavedSettings, "AudioLevelDoppler", handleAudioVolumeChanged);
+    setting_setup_signal_listener(gSavedSettings, "AudioLevelRolloff", handleAudioVolumeChanged);
+    setting_setup_signal_listener(gSavedSettings, "AudioLevelUnderwaterRolloff", handleAudioVolumeChanged);
+    setting_setup_signal_listener(gSavedSettings, "MuteAudio", handleAudioVolumeChanged);
+    setting_setup_signal_listener(gSavedSettings, "MuteMusic", handleAudioVolumeChanged);
+    setting_setup_signal_listener(gSavedSettings, "MuteMedia", handleAudioVolumeChanged);
+    setting_setup_signal_listener(gSavedSettings, "MuteVoice", handleAudioVolumeChanged);
+    setting_setup_signal_listener(gSavedSettings, "MuteAmbient", handleAudioVolumeChanged);
+    setting_setup_signal_listener(gSavedSettings, "MuteUI", handleAudioVolumeChanged);
+    setting_setup_signal_listener(gSavedSettings, "WLSkyDetail", handleWLSkyDetailChanged);
+    setting_setup_signal_listener(gSavedSettings, "JoystickAxis0", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "JoystickAxis1", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "JoystickAxis2", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "JoystickAxis3", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "JoystickAxis4", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "JoystickAxis5", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "JoystickAxis6", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "FlycamAxisScale0", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "FlycamAxisScale1", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "FlycamAxisScale2", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "FlycamAxisScale3", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "FlycamAxisScale4", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "FlycamAxisScale5", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "FlycamAxisScale6", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "FlycamAxisDeadZone0", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "FlycamAxisDeadZone1", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "FlycamAxisDeadZone2", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "FlycamAxisDeadZone3", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "FlycamAxisDeadZone4", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "FlycamAxisDeadZone5", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "FlycamAxisDeadZone6", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "AvatarAxisScale0", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "AvatarAxisScale1", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "AvatarAxisScale2", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "AvatarAxisScale3", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "AvatarAxisScale4", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "AvatarAxisScale5", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "AvatarAxisDeadZone0", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "AvatarAxisDeadZone1", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "AvatarAxisDeadZone2", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "AvatarAxisDeadZone3", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "AvatarAxisDeadZone4", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "AvatarAxisDeadZone5", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "BuildAxisScale0", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "BuildAxisScale1", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "BuildAxisScale2", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "BuildAxisScale3", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "BuildAxisScale4", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "BuildAxisScale5", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "BuildAxisDeadZone0", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "BuildAxisDeadZone1", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "BuildAxisDeadZone2", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "BuildAxisDeadZone3", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "BuildAxisDeadZone4", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "BuildAxisDeadZone5", handleJoystickChanged);
+    setting_setup_signal_listener(gSavedSettings, "DebugViews", handleDebugViewsChanged);
+    setting_setup_signal_listener(gSavedSettings, "UserLogFile", handleLogFileChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderHideGroupTitle", handleHideGroupTitleChanged);
+    setting_setup_signal_listener(gSavedSettings, "HighResSnapshot", handleHighResSnapshotChanged);
+    setting_setup_signal_listener(gSavedSettings, "EnableVoiceChat", handleVoiceClientPrefsChanged);
+    setting_setup_signal_listener(gSavedSettings, "PTTCurrentlyEnabled", handleVoiceClientPrefsChanged);
+    setting_setup_signal_listener(gSavedSettings, "PushToTalkButton", handleVoiceClientPrefsChanged);
+    setting_setup_signal_listener(gSavedSettings, "PushToTalkToggle", handleVoiceClientPrefsChanged);
+    setting_setup_signal_listener(gSavedSettings, "VoiceEarLocation", handleVoiceClientPrefsChanged);
+    setting_setup_signal_listener(gSavedSettings, "VoiceInputAudioDevice", handleVoiceClientPrefsChanged);
+    setting_setup_signal_listener(gSavedSettings, "VoiceOutputAudioDevice", handleVoiceClientPrefsChanged);
+    setting_setup_signal_listener(gSavedSettings, "AudioLevelMic", handleVoiceClientPrefsChanged);
+    setting_setup_signal_listener(gSavedSettings, "LipSyncEnabled", handleVoiceClientPrefsChanged);	
+    setting_setup_signal_listener(gSavedSettings, "VelocityInterpolate", handleVelocityInterpolate);
+    setting_setup_signal_listener(gSavedSettings, "QAMode", show_debug_menus);
+    setting_setup_signal_listener(gSavedSettings, "UseDebugMenus", show_debug_menus);
+    setting_setup_signal_listener(gSavedSettings, "AgentPause", toggle_agent_pause);
+    setting_setup_signal_listener(gSavedSettings, "ShowNavbarNavigationPanel", toggle_show_navigation_panel);
+    setting_setup_signal_listener(gSavedSettings, "ShowMiniLocationPanel", toggle_show_mini_location_panel);
+    setting_setup_signal_listener(gSavedSettings, "ShowObjectRenderingCost", toggle_show_object_render_cost);
+    setting_setup_signal_listener(gSavedSettings, "ForceShowGrid", handleForceShowGrid);
+    setting_setup_signal_listener(gSavedSettings, "RenderTransparentWater", handleRenderTransparentWaterChanged);
+    setting_setup_signal_listener(gSavedSettings, "SpellCheck", handleSpellCheckChanged);
+    setting_setup_signal_listener(gSavedSettings, "SpellCheckDictionary", handleSpellCheckChanged);
+    setting_setup_signal_listener(gSavedSettings, "LoginLocation", handleLoginLocationChanged);
+    setting_setup_signal_listener(gSavedSettings, "DebugAvatarJoints", handleDebugAvatarJointsChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderAutoMuteByteLimit", handleRenderAutoMuteByteLimitChanged);
+
+    setting_setup_signal_listener(gSavedSettings, "TargetFPS", handleTargetFPSChanged);
+    setting_setup_signal_listener(gSavedSettings, "AutoTuneFPS", handleAutoTuneFPSChanged);
+    setting_setup_signal_listener(gSavedSettings, "AutoTuneLock", handleAutoTuneLockChanged);
+    setting_setup_signal_listener(gSavedSettings, "RenderAvatarMaxART", handleRenderAvatarMaxARTChanged);
+    setting_setup_signal_listener(gSavedSettings, "PerfStatsCaptureEnabled", handlePerformanceStatsEnabledChanged);
+    setting_setup_signal_listener(gSavedSettings, "AutoTuneRenderFarClipTarget", handleUserTargetDrawDistanceChanged);
+    setting_setup_signal_listener(gSavedSettings, "AutoTuneImpostorFarAwayDistance", handleUserImpostorDistanceChanged);
+    setting_setup_signal_listener(gSavedSettings, "AutoTuneImpostorByDistEnabled", handleUserImpostorByDistEnabledChanged);
+    setting_setup_signal_listener(gSavedSettings, "TuningFPSStrategy", handleFPSTuningStrategyChanged);
 
     setting_setup_signal_listener(gSavedPerAccountSettings, "AvatarHoverOffsetZ", handleAvatarHoverOffsetChanged);
 }
diff --git a/indra/newview/llviewerdisplay.cpp b/indra/newview/llviewerdisplay.cpp
index 1730b02017..a2938eaefe 100644
--- a/indra/newview/llviewerdisplay.cpp
+++ b/indra/newview/llviewerdisplay.cpp
@@ -79,6 +79,7 @@
 #include "llscenemonitor.h"
 
 #include "llenvironment.h"
+#include "llperfstats.h"
 
 extern LLPointer<LLViewerTexture> gStartTexture;
 extern bool gShiftFrame;
@@ -243,6 +244,7 @@ void display_stats()
 // Paint the display!
 void display(BOOL rebuild, F32 zoom_factor, int subfield, BOOL for_snapshot)
 {
+    LLPerfStats::RecordSceneTime T (LLPerfStats::StatType_t::RENDER_DISPLAY); // render time capture - This is the main stat for overall rendering.
     LL_PROFILE_ZONE_NAMED_CATEGORY_DISPLAY("Render");
 
 	if (gWindowResized)
@@ -1090,7 +1092,8 @@ void display_cube_face()
 
 void render_hud_attachments()
 {
-	gGL.matrixMode(LLRender::MM_PROJECTION);
+    LLPerfStats::RecordSceneTime T ( LLPerfStats::StatType_t::RENDER_HUDS); // render time capture - Primary contributor to HUDs (though these end up in render batches)
+    gGL.matrixMode(LLRender::MM_PROJECTION);
 	gGL.pushMatrix();
 	gGL.matrixMode(LLRender::MM_MODELVIEW);
 	gGL.pushMatrix();
@@ -1289,7 +1292,8 @@ bool setup_hud_matrices(const LLRect& screen_region)
 
 void render_ui(F32 zoom_factor, int subfield)
 {
-	LL_PROFILE_ZONE_SCOPED_CATEGORY_UI; //LL_RECORD_BLOCK_TIME(FTM_RENDER_UI);
+    LLPerfStats::RecordSceneTime T ( LLPerfStats::StatType_t::RENDER_UI ); // render time capture - Primary UI stat can have HUD time overlap (TODO)
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_UI; //LL_RECORD_BLOCK_TIME(FTM_RENDER_UI);
     LL_PROFILE_GPU_ZONE("ui");
 	LLGLState::checkStates();
 	
@@ -1368,6 +1372,7 @@ void render_ui(F32 zoom_factor, int subfield)
 
 void swap()
 {
+    LLPerfStats::RecordSceneTime T ( LLPerfStats::StatType_t::RENDER_SWAP ); // render time capture - Swap buffer time - can signify excessive data transfer to/from GPU
     LL_PROFILE_ZONE_NAMED_CATEGORY_DISPLAY("Swap");
     LL_PROFILE_GPU_ZONE("swap");
 	if (gDisplaySwapBuffers)
diff --git a/indra/newview/llviewerfloaterreg.cpp b/indra/newview/llviewerfloaterreg.cpp
index 14d5a7c276..ca87ff0092 100644
--- a/indra/newview/llviewerfloaterreg.cpp
+++ b/indra/newview/llviewerfloaterreg.cpp
@@ -108,9 +108,11 @@
 #include "llfloaterpathfindingconsole.h"
 #include "llfloaterpathfindinglinksets.h"
 #include "llfloaterpay.h"
+#include "llfloaterperformance.h"
 #include "llfloaterperms.h"
 #include "llfloaterpostprocess.h"
 #include "llfloaterpreference.h"
+#include "llfloaterpreferencesgraphicsadvanced.h"
 #include "llfloaterpreferenceviewadvanced.h"
 #include "llfloaterpreviewtrash.h"
 #include "llfloaterprofile.h"
@@ -408,6 +410,7 @@ void LLViewerFloaterReg::registerFloaters()
 	LLFloaterReg::add("pathfinding_linksets", "floater_pathfinding_linksets.xml", (LLFloaterBuildFunc)&LLFloaterReg::build<LLFloaterPathfindingLinksets>);
 	LLFloaterReg::add("pathfinding_console", "floater_pathfinding_console.xml", (LLFloaterBuildFunc)&LLFloaterReg::build<LLFloaterPathfindingConsole>);
 	LLFloaterReg::add("people", "floater_people.xml", (LLFloaterBuildFunc)&LLFloaterReg::build<LLFloaterSidePanelContainer>);
+	LLFloaterReg::add("performance", "floater_performance.xml", (LLFloaterBuildFunc)&LLFloaterReg::build<LLFloaterPerformance>);
 	LLFloaterReg::add("perms_default", "floater_perms_default.xml", (LLFloaterBuildFunc)&LLFloaterReg::build<LLFloaterPermsDefault>);
 	LLFloaterReg::add("places", "floater_places.xml", (LLFloaterBuildFunc)&LLFloaterReg::build<LLFloaterSidePanelContainer>);
 	LLFloaterReg::add("preferences", "floater_preferences.xml", (LLFloaterBuildFunc)&LLFloaterReg::build<LLFloaterPreference>);
diff --git a/indra/newview/llviewerjointmesh.cpp b/indra/newview/llviewerjointmesh.cpp
index be2a1da968..00e1179896 100644
--- a/indra/newview/llviewerjointmesh.cpp
+++ b/indra/newview/llviewerjointmesh.cpp
@@ -55,6 +55,7 @@
 #include "m3math.h"
 #include "m4math.h"
 #include "llmatrix4a.h"
+#include "llperfstats.h" 
 
 #if !LL_DARWIN && !LL_LINUX
 extern PFNGLWEIGHTPOINTERARBPROC glWeightPointerARB;
@@ -226,6 +227,16 @@ U32 LLViewerJointMesh::drawShape( F32 pixelArea, BOOL first_pass, BOOL is_dummy)
 		return 0;
 	}
 
+    // render time capture
+    // This path does not appear to have attachments. Prove this then remove.
+    std::unique_ptr<LLPerfStats::RecordAttachmentTime> ratPtr{};
+    auto vobj = mFace->getViewerObject();
+    if( vobj && vobj->isAttachment() )
+    {
+        trackAttachments( vobj, mFace->isState(LLFace::RIGGED), &ratPtr );
+        LL_WARNS("trackAttachments") << "Attachment render time is captuted." << LL_ENDL;
+    }
+
 	U32 triangle_count = 0;
 
 	S32 diffuse_channel = LLDrawPoolAvatar::sDiffuseChannel;
diff --git a/indra/newview/llviewermenu.cpp b/indra/newview/llviewermenu.cpp
index 25efe189cb..d22ffc784a 100644
--- a/indra/newview/llviewermenu.cpp
+++ b/indra/newview/llviewermenu.cpp
@@ -3281,6 +3281,8 @@ class LLAvatarCheckImpostorMode : public view_listener_t
 				return (avatar->getVisualMuteSettings() == LLVOAvatar::AV_DO_NOT_RENDER);
 			case 2:
 				return (avatar->getVisualMuteSettings() == LLVOAvatar::AV_ALWAYS_RENDER);
+            case 4:
+                return (avatar->getVisualMuteSettings() != LLVOAvatar::AV_RENDER_NORMALLY);
 			default:
 				return false;
 		}
diff --git a/indra/newview/llviewerpartsim.cpp b/indra/newview/llviewerpartsim.cpp
index e5265f1dcd..449fd4ba43 100644
--- a/indra/newview/llviewerpartsim.cpp
+++ b/indra/newview/llviewerpartsim.cpp
@@ -716,7 +716,7 @@ void LLViewerPartSim::updateSimulation()
 
 			if (upd && vobj && (vobj->getPCode() == LL_PCODE_VOLUME))
 			{
-				if(vobj->getAvatar() && vobj->getAvatar()->isTooComplex())
+				if(vobj->getAvatar() && vobj->getAvatar()->isTooComplex() && vobj->getAvatar()->isTooSlow())
 				{
 					upd = FALSE;
 				}
diff --git a/indra/newview/llviewerstats.cpp b/indra/newview/llviewerstats.cpp
index 986319f26d..4babf5a7f6 100644
--- a/indra/newview/llviewerstats.cpp
+++ b/indra/newview/llviewerstats.cpp
@@ -58,6 +58,7 @@
 #include "llfeaturemanager.h"
 #include "llviewernetwork.h"
 #include "llmeshrepository.h" //for LLMeshRepository::sBytesReceived
+#include "llperfstats.h"
 #include "llsdserialize.h"
 #include "llsdutil.h"
 #include "llcorehttputil.h"
@@ -254,6 +255,13 @@ LLTrace::EventStatHandle<F64Seconds >	AVATAR_EDIT_TIME("avataredittime", "Second
 LLTrace::EventStatHandle<LLUnit<F32, LLUnits::Percent> > OBJECT_CACHE_HIT_RATE("object_cache_hits");
 
 LLTrace::EventStatHandle<F64Seconds >	TEXTURE_FETCH_TIME("texture_fetch_time");
+
+LLTrace::SampleStatHandle<LLUnit<F32, LLUnits::Percent> >  SCENERY_FRAME_PCT("scenery_frame_pct");
+LLTrace::SampleStatHandle<LLUnit<F32, LLUnits::Percent> >  AVATAR_FRAME_PCT("avatar_frame_pct");
+LLTrace::SampleStatHandle<LLUnit<F32, LLUnits::Percent> >  HUDS_FRAME_PCT("huds_frame_pct");
+LLTrace::SampleStatHandle<LLUnit<F32, LLUnits::Percent> >  UI_FRAME_PCT("ui_frame_pct");
+LLTrace::SampleStatHandle<LLUnit<F32, LLUnits::Percent> >  SWAP_FRAME_PCT("swap_frame_pct");
+LLTrace::SampleStatHandle<LLUnit<F32, LLUnits::Percent> >  IDLE_FRAME_PCT("idle_frame_pct");
 }
 
 LLViewerStats::LLViewerStats() 
@@ -452,6 +460,89 @@ void update_statistics()
 			texture_stats_timer.reset();
 		}
 	}
+
+    if (LLFloaterReg::instanceVisible("scene_load_stats"))
+    {
+        static const F32 perf_stats_freq = 1;
+        static LLFrameTimer perf_stats_timer;
+        if (perf_stats_timer.getElapsedTimeF32() >= perf_stats_freq)
+        {
+            LLStringUtil::format_map_t args;
+            LLPerfStats::bufferToggleLock.lock(); // prevent toggle for a moment
+
+            auto tot_frame_time_raw = LLPerfStats::StatsRecorder::getSceneStat(LLPerfStats::StatType_t::RENDER_FRAME);
+            // cumulative avatar time (includes idle processing, attachments and base av)
+            auto tot_avatar_time_raw = LLPerfStats::StatsRecorder::getSum(LLPerfStats::ObjType_t::OT_AVATAR, LLPerfStats::StatType_t::RENDER_COMBINED);
+            // cumulative avatar render specific time (a bit arbitrary as the processing is too.)
+            // auto tot_av_idle_time_raw = LLPerfStats::StatsRecorder::getSum(AvType, LLPerfStats::StatType_t::RENDER_IDLE);
+            // auto tot_avatar_render_time_raw = tot_avatar_time_raw - tot_av_idle_time_raw;
+            // the time spent this frame on the "display()" call. Treated as "tot time rendering"
+            auto tot_render_time_raw = LLPerfStats::StatsRecorder::getSceneStat(LLPerfStats::StatType_t::RENDER_DISPLAY);
+            // sleep time is basically forced sleep when window out of focus 
+            auto tot_sleep_time_raw = LLPerfStats::StatsRecorder::getSceneStat(LLPerfStats::StatType_t::RENDER_SLEEP);
+            // time spent on UI
+            auto tot_ui_time_raw = LLPerfStats::StatsRecorder::getSceneStat(LLPerfStats::StatType_t::RENDER_UI);
+            // cumulative time spent rendering HUDS
+            auto tot_huds_time_raw = LLPerfStats::StatsRecorder::getSceneStat(LLPerfStats::StatType_t::RENDER_HUDS);
+            // "idle" time. This is the time spent in the idle poll section of the main loop
+            auto tot_idle_time_raw = LLPerfStats::StatsRecorder::getSceneStat(LLPerfStats::StatType_t::RENDER_IDLE);
+            // similar to sleep time, induced by FPS limit
+            //auto tot_limit_time_raw = LLPerfStats::StatsRecorder::getSceneStat(LLPerfStats::StatType_t::RENDER_FPSLIMIT);
+            // swap time is time spent in swap buffer
+            auto tot_swap_time_raw = LLPerfStats::StatsRecorder::getSceneStat(LLPerfStats::StatType_t::RENDER_SWAP);
+
+            LLPerfStats::bufferToggleLock.unlock();
+
+             auto tot_frame_time_ns = LLPerfStats::raw_to_ns(tot_frame_time_raw);
+            auto tot_avatar_time_ns = LLPerfStats::raw_to_ns(tot_avatar_time_raw);
+            auto tot_huds_time_ns = LLPerfStats::raw_to_ns(tot_huds_time_raw);
+            // UI time includes HUD time so dedut that before we calc percentages
+            auto tot_ui_time_ns = LLPerfStats::raw_to_ns(tot_ui_time_raw - tot_huds_time_raw);
+
+            // auto tot_sleep_time_ns          = LLPerfStats::raw_to_ns( tot_sleep_time_raw );
+            // auto tot_limit_time_ns          = LLPerfStats::raw_to_ns( tot_limit_time_raw );
+
+            // auto tot_render_time_ns         = LLPerfStats::raw_to_ns( tot_render_time_raw );
+            auto tot_idle_time_ns = LLPerfStats::raw_to_ns(tot_idle_time_raw);
+            auto tot_swap_time_ns = LLPerfStats::raw_to_ns(tot_swap_time_raw);
+            auto tot_scene_time_ns = LLPerfStats::raw_to_ns(tot_render_time_raw - tot_avatar_time_raw - tot_swap_time_raw - tot_ui_time_raw);
+            // auto tot_overhead_time_ns  = LLPerfStats::raw_to_ns( tot_frame_time_raw - tot_render_time_raw - tot_idle_time_raw );
+
+            // // remove time spent sleeping for fps limit or out of focus.
+            // tot_frame_time_ns -= tot_limit_time_ns;
+            // tot_frame_time_ns -= tot_sleep_time_ns;
+
+            if (tot_frame_time_ns != 0)
+            {
+                auto pct_avatar_time = (tot_avatar_time_ns * 100) / tot_frame_time_ns;
+                auto pct_huds_time = (tot_huds_time_ns * 100) / tot_frame_time_ns;
+                auto pct_ui_time = (tot_ui_time_ns * 100) / tot_frame_time_ns;
+                auto pct_idle_time = (tot_idle_time_ns * 100) / tot_frame_time_ns;
+                auto pct_swap_time = (tot_swap_time_ns * 100) / tot_frame_time_ns;
+                auto pct_scene_render_time = (tot_scene_time_ns * 100) / tot_frame_time_ns;
+                pct_avatar_time = llclamp(pct_avatar_time, 0., 100.);
+                pct_huds_time = llclamp(pct_huds_time, 0., 100.);
+                pct_ui_time = llclamp(pct_ui_time, 0., 100.);
+                pct_idle_time = llclamp(pct_idle_time, 0., 100.);
+                pct_swap_time = llclamp(pct_swap_time, 0., 100.);
+                pct_scene_render_time = llclamp(pct_scene_render_time, 0., 100.);
+                if (tot_sleep_time_raw == 0)
+                {
+                    sample(LLStatViewer::SCENERY_FRAME_PCT, (U32)llround(pct_scene_render_time));
+                    sample(LLStatViewer::AVATAR_FRAME_PCT, (U32)llround(pct_avatar_time));
+                    sample(LLStatViewer::HUDS_FRAME_PCT, (U32)llround(pct_huds_time));
+                    sample(LLStatViewer::UI_FRAME_PCT, (U32)llround(pct_ui_time));
+                    sample(LLStatViewer::SWAP_FRAME_PCT, (U32)llround(pct_swap_time));
+                    sample(LLStatViewer::IDLE_FRAME_PCT, (U32)llround(pct_idle_time));
+                }
+            }
+            else
+            {
+                LL_WARNS("performance") << "Scene time 0. Skipping til we have data." << LL_ENDL;
+            }
+            perf_stats_timer.reset();
+        }
+    }
 }
 
 /*
@@ -551,6 +642,7 @@ void send_viewer_stats(bool include_preferences)
 
 	system["gpu"] = gpu_desc;
 	system["gpu_class"] = (S32)LLFeatureManager::getInstance()->getGPUClass();
+    system["gpu_memory_bandwidth"] = LLFeatureManager::getInstance()->getGPUMemoryBandwidth();
 	system["gpu_vendor"] = gGLManager.mGLVendorShort;
 	system["gpu_version"] = gGLManager.mDriverVersionVendorString;
 	system["opengl_version"] = gGLManager.mGLVersionString;
diff --git a/indra/newview/llvoavatar.cpp b/indra/newview/llvoavatar.cpp
index 5adb3f9ede..5b8f4767db 100644
--- a/indra/newview/llvoavatar.cpp
+++ b/indra/newview/llvoavatar.cpp
@@ -113,6 +113,8 @@
 #include "llrendersphere.h"
 #include "llskinningutil.h"
 
+#include "llperfstats.h"
+
 #include <boost/lexical_cast.hpp>
 
 extern F32 SPEED_ADJUST_MAX;
@@ -205,6 +207,8 @@ const F64 HUD_OVERSIZED_TEXTURE_DATA_SIZE = 1024 * 1024;
 
 const F32 MAX_TEXTURE_WAIT_TIME_SEC = 60;
 
+const S32 MIN_NONTUNED_AVS = 5;
+
 enum ERenderName
 {
 	RENDER_NAME_NEVER,
@@ -616,6 +620,8 @@ F32 LLVOAvatar::sUnbakedUpdateTime = 0.f;
 F32 LLVOAvatar::sGreyTime = 0.f;
 F32 LLVOAvatar::sGreyUpdateTime = 0.f;
 LLPointer<LLViewerTexture> LLVOAvatar::sCloudTexture = NULL;
+std::vector<LLUUID> LLVOAvatar::sAVsIgnoringARTLimit;
+S32 LLVOAvatar::sAvatarsNearby = 0;
 
 //-----------------------------------------------------------------------------
 // Helper functions
@@ -814,6 +820,14 @@ LLVOAvatar::~LLVOAvatar()
 		debugAvatarRezTime("AvatarRezLeftNotification","left sometime after declouding");
 	}
 
+    if(mTuned)
+    {
+        LLPerfStats::tunedAvatars--;
+        mTuned = false;
+    }
+    sAVsIgnoringARTLimit.erase(std::remove(sAVsIgnoringARTLimit.begin(), sAVsIgnoringARTLimit.end(), mID), sAVsIgnoringARTLimit.end());
+
+
 	logPendingPhases();
 	
 	LL_DEBUGS("Avatar") << "LLVOAvatar Destructor (0x" << this << ") id:" << mID << LL_ENDL;
@@ -2547,11 +2561,18 @@ void LLVOAvatar::idleUpdate(LLAgent &agent, const F64 &time)
 		LL_INFOS() << "Warning!  Idle on dead avatar" << LL_ENDL;
 		return;
 	}
+    // record time and refresh "tooSlow" status
+    LLPerfStats::RecordAvatarTime T(getID(), LLPerfStats::StatType_t::RENDER_IDLE); // per avatar "idle" time.
+    updateTooSlow();
 
 	static LLCachedControl<bool> disable_all_render_types(gSavedSettings, "DisableAllRenderTypes");
 	if (!(gPipeline.hasRenderType(mIsControlAvatar ? LLPipeline::RENDER_TYPE_CONTROL_AV : LLPipeline::RENDER_TYPE_AVATAR))
 		&& !disable_all_render_types && !isSelf())
 	{
+        if (!mIsControlAvatar)
+        {
+            idleUpdateNameTag( mLastRootPos );
+        }
 		return;
 	}
 
@@ -3131,7 +3152,7 @@ void LLVOAvatar::idleUpdateLoadingEffect()
 																 LLPartData::LL_PART_TARGET_POS_MASK );
 			
 			// do not generate particles for dummy or overly-complex avatars
-			if (!mIsDummy && !isTooComplex())
+			if (!mIsDummy && !isTooComplex() && !isTooSlow())
 			{
 				setParticleSource(particle_parameters, getID());
 			}
@@ -3216,11 +3237,9 @@ void LLVOAvatar::idleUpdateNameTag(const LLVector3& root_pos_last)
     static LLCachedControl<F32> FADE_DURATION(gSavedSettings, "RenderNameFadeDuration"); // seconds
     static LLCachedControl<bool> use_chat_bubbles(gSavedSettings, "UseChatBubbles");
 
-	bool visible_avatar = isVisible() || mNeedsAnimUpdate;
 	bool visible_chat = use_chat_bubbles && (mChats.size() || mTyping);
 	bool render_name =	visible_chat ||
-		(visible_avatar &&
-		 ((sRenderName == RENDER_NAME_ALWAYS) ||
+		(((sRenderName == RENDER_NAME_ALWAYS) ||
 		  (sRenderName == RENDER_NAME_FADE && time_visible < NAME_SHOW_TIME)));
 	// If it's your own avatar, don't draw in mouselook, and don't
 	// draw if we're specifically hiding our own name.
@@ -3715,7 +3734,7 @@ bool LLVOAvatar::isVisuallyMuted()
         }
 		else 
 		{
-			muted = isTooComplex();
+			muted = isTooComplex() || isTooSlow();
 		}
 	}
 
@@ -8275,6 +8294,133 @@ bool LLVOAvatar::isTooComplex() const
 	return too_complex;
 }
 
+bool LLVOAvatar::isTooSlow() const
+{
+    static LLCachedControl<bool> always_render_friends(gSavedSettings, "AlwaysRenderFriends");
+    bool render_friend =  (LLAvatarTracker::instance().isBuddy(getID()) && always_render_friends);
+
+    if (render_friend || mVisuallyMuteSetting == AV_ALWAYS_RENDER)
+    {
+        return false;
+    }
+    return mTooSlow;
+}
+
+// use Avatar Render Time as complexity metric
+// markARTStale - Mark stale and set the frameupdate to now so that we can wait at least one frame to get a revised number.
+void LLVOAvatar::markARTStale()
+{
+    mARTStale=true;
+    mLastARTUpdateFrame = LLFrameTimer::getFrameCount();
+}
+
+// Udpate Avatar state based on render time
+void LLVOAvatar::updateTooSlow()
+{
+    LL_PROFILE_ZONE_SCOPED_CATEGORY_AVATAR;
+    static LLCachedControl<bool> alwaysRenderFriends(gSavedSettings, "AlwaysRenderFriends");
+    static LLCachedControl<bool> allowSelfImpostor(gSavedSettings, "AllowSelfImpostor");
+    const auto id = getID();
+
+    // mTooSlow - Is the avatar flagged as being slow (includes shadow time)
+    // mTooSlowWithoutShadows - Is the avatar flagged as being slow even with shadows removed.
+    // mARTStale - the rendertime we have is stale because of an update. We need to force a re-render to re-assess slowness
+
+    if( mARTStale )
+    {
+        if ( LLFrameTimer::getFrameCount() - mLastARTUpdateFrame < 5 ) 
+        {
+            // LL_INFOS() << this->getFullname() << " marked stale " << LL_ENDL;
+            // we've not had a chance to update yet (allow a few to be certain a full frame has passed)
+            return;
+        }
+
+        mARTStale = false;
+        mTooSlow = false;
+        mTooSlowWithoutShadows = false;
+        // LL_INFOS() << this->getFullname() << " refreshed ART combined = " << mRenderTime << " @ " << mLastARTUpdateFrame << LL_ENDL;
+    }
+
+    // Either we're not stale or we've updated.
+
+    U64 render_time_raw;
+    U64 render_geom_time_raw;
+
+    if( !mTooSlow ) 
+    {
+        // we are fully rendered, so we use the live values
+        std::lock_guard<std::mutex> lock{LLPerfStats::bufferToggleLock};
+        render_time_raw = LLPerfStats::StatsRecorder::get(LLPerfStats::ObjType_t::OT_AVATAR, id, LLPerfStats::StatType_t::RENDER_COMBINED);
+        render_geom_time_raw = LLPerfStats::StatsRecorder::get(LLPerfStats::ObjType_t::OT_AVATAR, id, LLPerfStats::StatType_t::RENDER_GEOMETRY);
+    }
+    else
+    {
+        // use the cached values.
+        render_time_raw = mRenderTime;
+        render_geom_time_raw = mGeomTime;		
+    }
+
+	bool autotune = LLPerfStats::tunables.userAutoTuneEnabled && !mIsControlAvatar && !isSelf();
+
+	bool ignore_tune = false;
+    if (autotune && sAVsIgnoringARTLimit.size() > 0)
+    {
+        auto it = std::find(sAVsIgnoringARTLimit.begin(), sAVsIgnoringARTLimit.end(), mID);
+        if (it != sAVsIgnoringARTLimit.end())
+        {
+            S32 index = it - sAVsIgnoringARTLimit.begin();
+            ignore_tune = (index < (MIN_NONTUNED_AVS - sAvatarsNearby + 1 + LLPerfStats::tunedAvatars));
+        }
+    }
+
+	bool exceeds_max_ART =
+        ((LLPerfStats::renderAvatarMaxART_ns > 0) && (LLPerfStats::raw_to_ns(render_time_raw) >= LLPerfStats::renderAvatarMaxART_ns));
+
+    if (exceeds_max_ART && !ignore_tune)
+    {
+        if( !mTooSlow ) // if we were previously not slow (with or without shadows.)
+        {			
+            // if we weren't capped, we are now
+            mLastARTUpdateFrame = LLFrameTimer::getFrameCount();
+            mRenderTime = render_time_raw;
+            mGeomTime = render_geom_time_raw;
+            mARTStale = false;
+            mTooSlow = true;
+        }
+        if(!mTooSlowWithoutShadows) // if we were not previously above the full impostor cap
+        {
+            bool render_friend_or_exception =  	( alwaysRenderFriends && LLAvatarTracker::instance().isBuddy( id ) ) ||
+                ( getVisualMuteSettings() == LLVOAvatar::AV_ALWAYS_RENDER ); 
+            if( (!isSelf() || allowSelfImpostor) && !render_friend_or_exception  )
+            {
+                // Note: slow rendering Friends still get their shadows zapped.
+                mTooSlowWithoutShadows = (LLPerfStats::raw_to_ns(render_geom_time_raw) >= LLPerfStats::renderAvatarMaxART_ns);
+            }
+        }
+    }
+    else
+    {
+        // LL_INFOS() << this->getFullname() << " ("<< (combined?"combined":"geometry") << ") good render time = " << LLPerfStats::raw_to_ns(render_time_raw) << " vs ("<< LLVOAvatar::sRenderTimeCap_ns << " set @ " << mLastARTUpdateFrame << LL_ENDL;
+        mTooSlow = false;
+        mTooSlowWithoutShadows = false;
+
+		if (ignore_tune)
+		{
+            return;
+		}
+    }
+    if(mTooSlow && !mTuned)
+    {
+        LLPerfStats::tunedAvatars++; // increment the number of avatars that have been tweaked.
+        mTuned = true;
+    }
+    else if(!mTooSlow && mTuned)
+    {
+        LLPerfStats::tunedAvatars--;
+        mTuned = false;
+    }
+}
+
 //-----------------------------------------------------------------------------
 // findMotion()
 //-----------------------------------------------------------------------------
@@ -10536,6 +10682,64 @@ void LLVOAvatar::idleUpdateRenderComplexity()
 
     // Render Complexity
     calculateUpdateRenderComplexity(); // Update mVisualComplexity if needed	
+
+	bool autotune = LLPerfStats::tunables.userAutoTuneEnabled && !mIsControlAvatar && !isSelf();
+    if (autotune && !isDead())
+    {
+        static LLCachedControl<F32> render_far_clip(gSavedSettings, "RenderFarClip", 64);
+        F32 radius = render_far_clip * render_far_clip;
+
+        bool is_nearby = true;
+        if ((dist_vec_squared(getPositionGlobal(), gAgent.getPositionGlobal()) > radius) &&
+            (dist_vec_squared(getPositionGlobal(), gAgentCamera.getCameraPositionGlobal()) > radius))
+        {
+            is_nearby = false;
+        }
+
+        if (is_nearby && (sAVsIgnoringARTLimit.size() < MIN_NONTUNED_AVS))
+        {
+            if (std::count(sAVsIgnoringARTLimit.begin(), sAVsIgnoringARTLimit.end(), mID) == 0)
+            {
+                sAVsIgnoringARTLimit.push_back(mID);
+            }
+        }
+        else if (!is_nearby)
+        {
+            sAVsIgnoringARTLimit.erase(std::remove(sAVsIgnoringARTLimit.begin(), sAVsIgnoringARTLimit.end(), mID),
+                                       sAVsIgnoringARTLimit.end());
+        }
+        updateNearbyAvatarCount();
+    }
+}
+
+void LLVOAvatar::updateNearbyAvatarCount()
+{
+    static LLFrameTimer agent_update_timer;
+
+	if (agent_update_timer.getElapsedTimeF32() > 1.0f)
+    {
+        S32 avs_nearby = 0;
+        static LLCachedControl<F32> render_far_clip(gSavedSettings, "RenderFarClip", 64);
+        F32 radius = render_far_clip * render_far_clip;
+        std::vector<LLCharacter *>::iterator char_iter = LLCharacter::sInstances.begin();
+        while (char_iter != LLCharacter::sInstances.end())
+        {
+            LLVOAvatar *avatar = dynamic_cast<LLVOAvatar *>(*char_iter);
+            if (avatar && !avatar->isDead() && !avatar->isControlAvatar())
+            {
+                if ((dist_vec_squared(avatar->getPositionGlobal(), gAgent.getPositionGlobal()) > radius) &&
+                    (dist_vec_squared(avatar->getPositionGlobal(), gAgentCamera.getCameraPositionGlobal()) > radius))
+                {
+                    char_iter++;
+                    continue;
+                }
+                avs_nearby++;
+            }
+            char_iter++;
+        }
+        sAvatarsNearby = avs_nearby;
+        agent_update_timer.reset();
+    }
 }
 
 void LLVOAvatar::idleUpdateDebugInfo()
@@ -10634,7 +10838,8 @@ void LLVOAvatar::accountRenderComplexityForObject(
     const F32 max_attachment_complexity,
     LLVOVolume::texture_cost_t& textures,
     U32& cost,
-    hud_complexity_list_t& hud_complexity_list)
+    hud_complexity_list_t& hud_complexity_list,
+    object_complexity_list_t& object_complexity_list)
 {
     if (attached_object && !attached_object->isHUDAttachment())
 		{
@@ -10692,6 +10897,15 @@ void LLVOAvatar::accountRenderComplexityForObject(
                                                    << LL_ENDL;
                             // Limit attachment complexity to avoid signed integer flipping of the wearer's ACI
                             cost += (U32)llclamp(attachment_total_cost, MIN_ATTACHMENT_COMPLEXITY, max_attachment_complexity);
+
+                            if (isSelf())
+                            {
+                                LLObjectComplexity object_complexity;
+                                object_complexity.objectName = attached_object->getAttachmentItemName();
+                                object_complexity.objectId = attached_object->getAttachmentItemID();
+                                object_complexity.objectCost = attachment_total_cost;
+                                object_complexity_list.push_back(object_complexity);
+                            }
 						}
 					}
 				}
@@ -10789,6 +11003,7 @@ void LLVOAvatar::calculateUpdateRenderComplexity()
 		U32 cost = VISUAL_COMPLEXITY_UNKNOWN;
 		LLVOVolume::texture_cost_t textures;
 		hud_complexity_list_t hud_complexity_list;
+        object_complexity_list_t object_complexity_list;
 
 		for (U8 baked_index = 0; baked_index < BAKED_NUM_INDICES; baked_index++)
 		{
@@ -10832,7 +11047,7 @@ void LLVOAvatar::calculateUpdateRenderComplexity()
             if (volp && !volp->isAttachment())
             {
                 accountRenderComplexityForObject(volp, max_attachment_complexity,
-                                                 textures, cost, hud_complexity_list);
+                                                 textures, cost, hud_complexity_list, object_complexity_list);
             }
         }
 
@@ -10848,7 +11063,7 @@ void LLVOAvatar::calculateUpdateRenderComplexity()
 			{
                 LLViewerObject* attached_object = attachment_iter->get();
                 accountRenderComplexityForObject(attached_object, max_attachment_complexity,
-                                                 textures, cost, hud_complexity_list);
+                                                 textures, cost, hud_complexity_list, object_complexity_list);
 			}
 		}
 
@@ -10913,7 +11128,7 @@ void LLVOAvatar::calculateUpdateRenderComplexity()
         {
             // Avatar complexity
             LLAvatarRenderNotifier::getInstance()->updateNotificationAgent(mVisualComplexity);
-
+            LLAvatarRenderNotifier::getInstance()->setObjectComplexityList(object_complexity_list);
             // HUD complexity
             LLHUDRenderNotifier::getInstance()->updateNotificationHUD(hud_complexity_list);
         }
@@ -11088,7 +11303,7 @@ LLVOAvatar::AvatarOverallAppearance LLVOAvatar::getOverallAppearance() const
 		{	// Always want to see this AV as an impostor
 			result = AOA_JELLYDOLL;
 		}
-		else if (isTooComplex())
+		else if (isTooComplex() || isTooSlow())
 		{
 			result = AOA_JELLYDOLL;
 		}
@@ -11115,7 +11330,7 @@ void LLVOAvatar::calcMutedAVColor()
         new_color = LLColor4::grey4;
         change_msg = " blocked: color is grey4";
     }
-    else if (!isTooComplex())
+    else if (!isTooComplex() && !isTooSlow())
     {
         new_color = LLColor4::white;
         change_msg = " simple imposter ";
diff --git a/indra/newview/llvoavatar.h b/indra/newview/llvoavatar.h
index cbb2d4ac76..1502c25b4d 100644
--- a/indra/newview/llvoavatar.h
+++ b/indra/newview/llvoavatar.h
@@ -299,7 +299,8 @@ public:
                                                      const F32 max_attachment_complexity,
                                                      LLVOVolume::texture_cost_t& textures,
                                                      U32& cost,
-                                                     hud_complexity_list_t& hud_complexity_list);
+                                                     hud_complexity_list_t& hud_complexity_list,
+                                                     object_complexity_list_t& object_complexity_list);
 	void			calculateUpdateRenderComplexity();
 	static const U32 VISUAL_COMPLEXITY_UNKNOWN;
 	void			updateVisualComplexity();
@@ -316,6 +317,8 @@ public:
 
 	void 			idleUpdateBelowWater();
 
+	static void updateNearbyAvatarCount();
+
 	//--------------------------------------------------------------------
 	// Static preferences (controlled by user settings/menus)
 	//--------------------------------------------------------------------
@@ -340,6 +343,9 @@ public:
 
     static LLPointer<LLViewerTexture>  sCloudTexture;
 
+	static std::vector<LLUUID> sAVsIgnoringARTLimit;
+    static S32 sAvatarsNearby;
+
 	//--------------------------------------------------------------------
 	// Region state
 	//--------------------------------------------------------------------
@@ -351,6 +357,16 @@ public:
 	//--------------------------------------------------------------------
 public:
 	BOOL			isFullyLoaded() const;
+
+    // check and return current state relative to limits
+    // default will test only the geometry (combined=false).
+    // this allows us to disable shadows separately on complex avatars.
+
+    inline bool 	isTooSlowWithoutShadows() const {return mTooSlowWithoutShadows;};
+    bool 	isTooSlow() const;
+
+    void 			updateTooSlow();
+
 	bool 			isTooComplex() const;
 	bool 			visualParamWeightsAreDefault();
 	virtual bool	getIsCloud() const;
@@ -370,6 +386,7 @@ public:
 	void 			logMetricsTimerRecord(const std::string& phase_name, F32 elapsed, bool completed);
 
     void            calcMutedAVColor();
+    void            markARTStale();
 
 protected:
 	LLViewerStats::PhaseMap& getPhases() { return mPhases; }
@@ -391,6 +408,17 @@ private:
 	LLFrameTimer	mFullyLoadedTimer;
 	LLFrameTimer	mRuthTimer;
 
+    U32				mLastARTUpdateFrame{0};
+    U64				mRenderTime{0};
+    U64				mGeomTime{0};
+    bool			mARTStale{true};
+    bool			mARTCapped{false};
+    // variables to hold "slowness" status
+    bool			mTooSlow{false};
+    bool			mTooSlowWithoutShadows{false};
+
+    bool            mTuned{false};
+
 private:
 	LLViewerStats::PhaseMap mPhases;
 
@@ -1146,6 +1174,8 @@ public:
 	// COF version of last appearance message received for this av.
 	S32 mLastUpdateReceivedCOFVersion;
 
+    U64 getLastART() const { return mRenderTime; }
+
 /**                    Diagnostics
  **                                                                            **
  *******************************************************************************/
diff --git a/indra/newview/llvovolume.cpp b/indra/newview/llvovolume.cpp
index b482ded121..12ceb86e52 100644
--- a/indra/newview/llvovolume.cpp
+++ b/indra/newview/llvovolume.cpp
@@ -88,6 +88,7 @@
 #include "llcallstack.h"
 #include "llsculptidsize.h"
 #include "llavatarappearancedefines.h"
+#include "llperfstats.h" 
 #include "llgltfmateriallist.h"
 
 const F32 FORCE_SIMPLE_RENDER_AREA = 512.f;
@@ -5454,7 +5455,7 @@ void LLVolumeGeometryManager::registerFace(LLSpatialGroup* group, LLFace* facep,
 			}
 		}
 		
-		if (type == LLRenderPass::PASS_ALPHA)
+		// if (type == LLRenderPass::PASS_ALPHA) // always populate the draw_info ptr
 		{ //for alpha sorting
 			facep->setDrawInfo(draw_info);
 		}
@@ -5656,6 +5657,7 @@ void LLVolumeGeometryManager::rebuildGeom(LLSpatialGroup* group)
         LL_PROFILE_ZONE_NAMED("rebuildGeom - face list");
 
 		//get all the faces into a list
+        std::unique_ptr<LLPerfStats::RecordAttachmentTime> ratPtr{};
 		for (LLSpatialGroup::element_iter drawable_iter = group->getDataBegin(); 
              drawable_iter != group->getDataEnd(); ++drawable_iter)
 		{
@@ -5691,6 +5693,11 @@ void LLVolumeGeometryManager::rebuildGeom(LLSpatialGroup* group)
 				continue;
 			}
 
+            if(vobj->isAttachment())
+            {
+                trackAttachments( vobj, drawablep->isState(LLDrawable::RIGGED),&ratPtr);
+            }
+
 			LLVolume* volume = vobj->getVolume();
 			if (volume)
 			{
@@ -6088,6 +6095,7 @@ void LLVolumeGeometryManager::rebuildMesh(LLSpatialGroup* group)
 
 			U32 buffer_count = 0;
 
+            std::unique_ptr<LLPerfStats::RecordAttachmentTime> ratPtr{};
 			for (LLSpatialGroup::element_iter drawable_iter = group->getDataBegin(); drawable_iter != group->getDataEnd(); ++drawable_iter)
 			{
 				LLDrawable* drawablep = (LLDrawable*)(*drawable_iter)->getDrawable();
@@ -6097,6 +6105,11 @@ void LLVolumeGeometryManager::rebuildMesh(LLSpatialGroup* group)
 					LLVOVolume* vobj = drawablep->getVOVolume();
 					
 					if (!vobj) continue;
+
+                    if (vobj->isAttachment())
+                    {
+                        trackAttachments( vobj, drawablep->isState(LLDrawable::RIGGED), &ratPtr );
+                    }
 					
 					if (debugLoggingEnabled("AnimatedObjectsLinkset"))
 					{
@@ -6466,10 +6479,16 @@ U32 LLVolumeGeometryManager::genDrawInfo(LLSpatialGroup* group, U32 mask, LLFace
 		U32 indices_index = 0;
 		U16 index_offset = 0;
 
-		while (face_iter < i)
+        std::unique_ptr<LLPerfStats::RecordAttachmentTime> ratPtr;
+        while (face_iter < i)
 		{
 			//update face indices for new buffer
 			facep = *face_iter;
+            LLViewerObject* vobj = facep->getViewerObject();
+            if(vobj && vobj->isAttachment())
+            {
+                trackAttachments(vobj, LLPipeline::sShadowRender, &ratPtr);
+            }
 			if (buffer.isNull())
 			{
 				// Bulk allocation failed
diff --git a/indra/newview/llworld.cpp b/indra/newview/llworld.cpp
index 9fa3d18a40..72c8cb371f 100644
--- a/indra/newview/llworld.cpp
+++ b/indra/newview/llworld.cpp
@@ -33,6 +33,7 @@
 #include "llstl.h"
 
 #include "llagent.h"
+#include "llagentcamera.h"
 #include "llviewercontrol.h"
 #include "lldrawpool.h"
 #include "llglheaders.h"
@@ -1423,6 +1424,32 @@ void LLWorld::getAvatars(uuid_vec_t* avatar_ids, std::vector<LLVector3d>* positi
 	}
 }
 
+S32 LLWorld::getNearbyAvatarsAndCompl(std::vector<LLCharacter*> &valid_nearby_avs)
+{
+    static LLCachedControl<F32> render_far_clip(gSavedSettings, "RenderFarClip", 64);
+    S32 nearby_max_complexity = 0;
+    F32 radius = render_far_clip * render_far_clip;
+    std::vector<LLCharacter*>::iterator char_iter = LLCharacter::sInstances.begin();
+    while (char_iter != LLCharacter::sInstances.end())
+    {
+        LLVOAvatar* avatar = dynamic_cast<LLVOAvatar*>(*char_iter);
+        if (avatar && !avatar->isDead() && !avatar->isControlAvatar())
+        {
+            if ((dist_vec_squared(avatar->getPositionGlobal(), gAgent.getPositionGlobal()) > radius) &&
+                (dist_vec_squared(avatar->getPositionGlobal(), gAgentCamera.getCameraPositionGlobal()) > radius))
+            {
+                char_iter++;
+                continue;
+            }
+            avatar->calculateUpdateRenderComplexity();
+            nearby_max_complexity = llmax(nearby_max_complexity, (S32)avatar->getVisualComplexity());
+            valid_nearby_avs.push_back(*char_iter);
+        }
+        char_iter++;
+    }
+    return nearby_max_complexity;
+}
+
 bool LLWorld::isRegionListed(const LLViewerRegion* region) const
 {
 	region_list_t::const_iterator it = find(mRegionList.begin(), mRegionList.end(), region);
diff --git a/indra/newview/llworld.h b/indra/newview/llworld.h
index 5dee8eea0f..b2be36d72c 100644
--- a/indra/newview/llworld.h
+++ b/indra/newview/llworld.h
@@ -51,6 +51,7 @@ class LLHost;
 class LLViewerObject;
 class LLSurfacePatch;
 
+class LLCharacter;
 class LLCloudPuff;
 class LLCloudGroup;
 class LLVOAvatar;
@@ -171,6 +172,8 @@ public:
 	// or if the circuit to this simulator had been lost.
 	bool isRegionListed(const LLViewerRegion* region) const;
 
+    S32 getNearbyAvatarsAndCompl(std::vector<LLCharacter*> &valid_nearby_avs);
+
 private:
     void clearHoleWaterObjects();
     void clearEdgeWaterObjects();
diff --git a/indra/newview/pipeline.cpp b/indra/newview/pipeline.cpp
index c890585b9f..c482256309 100644
--- a/indra/newview/pipeline.cpp
+++ b/indra/newview/pipeline.cpp
@@ -43,6 +43,7 @@
 #include "llui.h" 
 #include "llglheaders.h"
 #include "llrender.h"
+#include "llstartup.h"
 #include "llwindow.h"	// swapBuffers()
 
 // newview includes
@@ -127,6 +128,7 @@ U32 LLPipeline::RenderFSAASamples;
 U32 LLPipeline::RenderResolutionDivisor;
 bool LLPipeline::RenderUIBuffer;
 S32 LLPipeline::RenderShadowDetail;
+S32 LLPipeline::RenderShadowSplits;
 bool LLPipeline::RenderDeferredSSAO;
 F32 LLPipeline::RenderShadowResolutionScale;
 bool LLPipeline::RenderLocalLights;
@@ -481,6 +483,7 @@ void LLPipeline::init()
 	connectRefreshCachedSettingsSafe("RenderResolutionDivisor");
 	connectRefreshCachedSettingsSafe("RenderUIBuffer");
 	connectRefreshCachedSettingsSafe("RenderShadowDetail");
+    connectRefreshCachedSettingsSafe("RenderShadowSplits");
 	connectRefreshCachedSettingsSafe("RenderDeferredSSAO");
 	connectRefreshCachedSettingsSafe("RenderShadowResolutionScale");
 	connectRefreshCachedSettingsSafe("RenderLocalLights");
@@ -549,7 +552,6 @@ void LLPipeline::init()
 
 LLPipeline::~LLPipeline()
 {
-
 }
 
 void LLPipeline::cleanup()
@@ -965,6 +967,7 @@ void LLPipeline::refreshCachedSettings()
 	RenderResolutionDivisor = gSavedSettings.getU32("RenderResolutionDivisor");
 	RenderUIBuffer = gSavedSettings.getBOOL("RenderUIBuffer");
 	RenderShadowDetail = gSavedSettings.getS32("RenderShadowDetail");
+    RenderShadowSplits = gSavedSettings.getS32("RenderShadowSplits");
 	RenderDeferredSSAO = gSavedSettings.getBOOL("RenderDeferredSSAO");
 	RenderShadowResolutionScale = gSavedSettings.getF32("RenderShadowResolutionScale");
 	RenderLocalLights = gSavedSettings.getBOOL("RenderLocalLights");
@@ -5477,7 +5480,7 @@ void LLPipeline::calcNearbyLights(LLCamera& camera)
 			LLDrawable* drawable = light->drawable;
             const LLViewerObject *vobj = light->drawable->getVObj();
             if(vobj && vobj->getAvatar() 
-               && (vobj->getAvatar()->isTooComplex() || vobj->getAvatar()->isInMuteList())
+               && (vobj->getAvatar()->isTooComplex() || vobj->getAvatar()->isInMuteList() || vobj->getAvatar()->isTooSlow())
                )
             {
                 drawable->clearState(LLDrawable::NEARBY_LIGHT);
@@ -5556,7 +5559,7 @@ void LLPipeline::calcNearbyLights(LLCamera& camera)
 				continue;
 			}
             LLVOAvatar * av = light->getAvatar();
-            if (av && (av->isTooComplex() || av->isInMuteList()))
+            if (av && (av->isTooComplex() || av->isInMuteList() || av->isTooSlow()))
             {
                 // avatars that are already in the list will be removed by removeMutedAVsLights
                 continue;
@@ -9454,14 +9457,7 @@ void LLPipeline::generateSunShadow(LLCamera& camera)
 	
 	if (mSunDiffuse == LLColor4::black)
 	{ //sun diffuse is totally black shadows don't matter
-		LLGLDepthTest depth(GL_TRUE);
-
-		for (S32 j = 0; j < 4; j++)
-		{
-			mRT->shadow[j].bindTarget();
-			mRT->shadow[j].clear();
-			mRT->shadow[j].flush();
-		}
+        skipRenderingShadows();
 	}
 	else
 	{
@@ -9517,7 +9513,8 @@ void LLPipeline::generateSunShadow(LLCamera& camera)
 
 			std::vector<LLVector3> fp;
 
-			if (!gPipeline.getVisiblePointCloud(shadow_cam, min, max, fp, lightDir))
+			if (!gPipeline.getVisiblePointCloud(shadow_cam, min, max, fp, lightDir)
+                || j > RenderShadowSplits)
 			{
 				//no possible shadow receivers
                 if (!gPipeline.hasRenderDebugMask(LLPipeline::RENDER_DEBUG_SHADOW_FRUSTA) && !gCubeSnapshot)
@@ -10087,10 +10084,10 @@ void LLPipeline::generateImpostor(LLVOAvatar* avatar, bool preview_avatar)
                               << " is " << ( too_complex ? "" : "not ") << "too complex"
                               << LL_ENDL;
 
-	pushRenderTypeMask();
-	
-	if (visually_muted || too_complex)
-	{
+    pushRenderTypeMask();
+
+    if (visually_muted || too_complex)
+    {
         // only show jelly doll geometry
 		andRenderTypeMask(LLPipeline::RENDER_TYPE_AVATAR,
 							LLPipeline::RENDER_TYPE_CONTROL_AV,
@@ -10718,9 +10715,32 @@ void LLPipeline::restoreHiddenObject( const LLUUID& id )
 	}
 }
 
+void LLPipeline::skipRenderingShadows()
+{
+    LLGLDepthTest depth(GL_TRUE);
+
+    for (S32 j = 0; j < 4; j++)
+    {
+        mRT->shadow[j].bindTarget();
+        mRT->shadow[j].clear();
+        mRT->shadow[j].flush();
+    }
+}
+
+void LLPipeline::handleShadowDetailChanged()
+{
+    if (RenderShadowDetail > gSavedSettings.getS32("RenderShadowDetail"))
+    {
+        skipRenderingShadows();
+    }
+    else
+    {
+        LLViewerShaderMgr::instance()->setShaders();
+    }
+}
+
 void LLPipeline::overrideEnvironmentMap()
 {
     //mReflectionMapManager.mProbes.clear();
     //mReflectionMapManager.addProbe(LLViewerCamera::instance().getOrigin());
 }
-
diff --git a/indra/newview/pipeline.h b/indra/newview/pipeline.h
index a7ae290f9c..dbd1a34f61 100644
--- a/indra/newview/pipeline.h
+++ b/indra/newview/pipeline.h
@@ -435,6 +435,7 @@ public:
 	void skipRenderingOfTerrain( bool flag );
 	void hideObject( const LLUUID& id );
 	void restoreHiddenObject( const LLUUID& id );
+    void handleShadowDetailChanged();
 
     LLReflectionMapManager mReflectionMapManager;
     void overrideEnvironmentMap();
@@ -449,6 +450,7 @@ private:
 	void connectRefreshCachedSettingsSafe(const std::string name);
 	void hideDrawable( LLDrawable *pDrawable );
 	void unhideDrawable( LLDrawable *pDrawable );
+    void skipRenderingShadows();
 public:
 	enum {GPU_CLASS_MAX = 3 };
 
@@ -765,7 +767,6 @@ protected:
 	U64						mOldRenderDebugMask;
 	std::stack<U32>			mRenderDebugFeatureStack;
 
-	
 	/////////////////////////////////////////////
 	//
 	//
@@ -959,6 +960,7 @@ public:
 	static U32 RenderResolutionDivisor;
 	static bool RenderUIBuffer;
 	static S32 RenderShadowDetail;
+    static S32 RenderShadowSplits;
 	static bool RenderDeferredSSAO;
 	static F32 RenderShadowResolutionScale;
 	static bool RenderLocalLights;
diff --git a/indra/newview/skins/default/colors.xml b/indra/newview/skins/default/colors.xml
index 8bb3feaeb0..6efe302f30 100644
--- a/indra/newview/skins/default/colors.xml
+++ b/indra/newview/skins/default/colors.xml
@@ -983,12 +983,15 @@
     name="OutfitGalleryItemUnselected"
     value="0.4 0.4 0.4 1" />
   <color
-    name="AddPaymentPanel"
+    name="PanelGray"
     value="0.27 0.27 0.27 1" />
   <color
+    name="PerformanceMid"
+    value="1 0.8 0 1" />
+  <color
     name="OutfitSnapshotMacMask"
     value="0.115 0.115 0.115 1"/>
- <color
-   name="OutfitSnapshotMacMask2"
-   value="0.1 0.1 0.1 1"/>
+  <color
+    name="OutfitSnapshotMacMask2"
+    value="0.1 0.1 0.1 1"/>
 </colors>
diff --git a/indra/newview/skins/default/textures/textures.xml b/indra/newview/skins/default/textures/textures.xml
index bdf12d73fc..61257466aa 100644
--- a/indra/newview/skins/default/textures/textures.xml
+++ b/indra/newview/skins/default/textures/textures.xml
@@ -150,6 +150,7 @@ with the same filename but different name
   <texture name="Command_Move_Icon"         file_name="toolbar_icons/move.png"         preload="true" />
   <texture name="Command_Environments_Icon" file_name="toolbar_icons/environments.png" preload="true" />
   <texture name="Command_People_Icon"       file_name="toolbar_icons/people.png"       preload="true" />
+  <texture name="Command_Performance_Icon"  file_name="toolbar_icons/performance.png"  preload="true" />
   <texture name="Command_Picks_Icon"        file_name="toolbar_icons/picks.png"        preload="true" />
   <texture name="Command_Places_Icon"       file_name="toolbar_icons/places.png"       preload="true" />
   <texture name="Command_Preferences_Icon"  file_name="toolbar_icons/preferences.png"  preload="true" />
diff --git a/indra/newview/skins/default/textures/toolbar_icons/performance.png b/indra/newview/skins/default/textures/toolbar_icons/performance.png
new file mode 100644
index 0000000000..91baf849c8
--- /dev/null
+++ b/indra/newview/skins/default/textures/toolbar_icons/performance.png
diff --git a/indra/newview/skins/default/xui/en/floater_add_payment_method.xml b/indra/newview/skins/default/xui/en/floater_add_payment_method.xml
index 1f980564d4..ac88263aa1 100644
--- a/indra/newview/skins/default/xui/en/floater_add_payment_method.xml
+++ b/indra/newview/skins/default/xui/en/floater_add_payment_method.xml
@@ -19,7 +19,7 @@
   </floater.string>
   <panel
    background_opaque="false"
-   bg_alpha_color="AddPaymentPanel"
+   bg_alpha_color="PanelGray"
    border_visible="false"
    background_visible="true"
    label="wrapper_panel"
diff --git a/indra/newview/skins/default/xui/en/floater_avatar_render_settings.xml b/indra/newview/skins/default/xui/en/floater_avatar_render_settings.xml
index e088d4d2a1..d222dca98b 100644
--- a/indra/newview/skins/default/xui/en/floater_avatar_render_settings.xml
+++ b/indra/newview/skins/default/xui/en/floater_avatar_render_settings.xml
@@ -10,7 +10,7 @@
  save_rect="true"
  single_instance="true"
  reuse_instance="true"
- title="AVATAR RENDER SETTINGS"
+ title="AVATAR DISPLAY EXCEPTIONS"
  width="300">
     <string
      name="av_never_render"
@@ -18,53 +18,45 @@
     <string
      name="av_always_render"
      value="Always"/>
-    <filter_editor
-     follows="left|top|right"
-     height="23"
-     layout="topleft"
-     left="8"
-     right="-47"
-     label="Filter People"
-     max_length_chars="300"
-     name="people_filter_input"
-     text_color="Black"
-     text_pad_left="10"
-     top="4" />
-    <menu_button
-     follows="top|right"
-     height="25"
-     image_hover_unselected="Toolbar_Middle_Over"
-     image_overlay="AddItem_Off"
-     image_selected="Toolbar_Middle_Selected"
-     image_unselected="Toolbar_Middle_Off"
-     layout="topleft"
-     left_pad="7"
-     menu_filename="menu_avatar_rendering_settings_add.xml"
-     menu_position="bottomleft"
-     name="plus_btn"
-     tool_tip="Actions on selected person"
-     top="3"
-     width="31" />
     <name_list
-     bottom="-8"
+     bottom="-33"
      draw_heading="true"
      follows="all"
      left="8"
      multi_select="false"
      name="render_settings_list"
      right="-8"
-     top="32">
+     top="0">
         <name_list.columns
          label="Name"
          name="name"
-         relative_width="0.5" />
+         relative_width="0.65" />
         <name_list.columns
-         label="Render setting"
+         label="Full detail"
          name="setting"
-         relative_width="0.25" />
-        <name_list.columns
-         label="Date added"
-         name="timestamp"
-         relative_width="0.25" />
+         relative_width="0.35" />
      </name_list>
+    <panel
+     bg_alpha_color="ScrollBgWriteableColor"
+     background_visible="true"
+     background_opaque="false"
+     bevel_style="none"
+     follows="bottom|left|right"
+     name="add_subpanel"
+     layout="topleft"
+     height="28"
+     top_pad="0">
+     <menu_button
+       follows="bottom|left"
+       height="25"
+       label="Add someone..."
+       layout="topleft"
+       menu_filename="menu_avatar_rendering_settings_add.xml"
+       menu_position="bottomleft"
+       name="plus_btn"
+       tool_tip="Actions on selected person"
+       top="1"
+       left="8"
+       width="120" />
+     </panel>
 </floater>
diff --git a/indra/newview/skins/default/xui/en/floater_performance.xml b/indra/newview/skins/default/xui/en/floater_performance.xml
new file mode 100644
index 0000000000..d1a1119f77
--- /dev/null
+++ b/indra/newview/skins/default/xui/en/floater_performance.xml
@@ -0,0 +1,368 @@
+<?xml version="1.0" encoding="utf-8" standalone="yes" ?>
+<floater
+ height="642"
+ layout="topleft"
+ name="performance"
+ save_rect="true"
+ reuse_instance="true"
+ title="IMPROVE GRAPHICS SPEED"
+ width="580">
+  <string
+   name="fps_text"
+   value="frames per second"/>
+  <string
+   name="max_text"
+   value=" (maximum)"/>
+  <panel
+   bevel_style="none"
+   follows="left|top"
+   height="540"
+   width="580"
+   name="panel_top"
+   visible="true"
+   layout="topleft"
+   left="0"   
+   top="0">
+    <panel
+     bg_alpha_color="black"
+     background_visible="true"
+     background_opaque="false"
+     border="false"
+     bevel_style="none"
+     follows="left|top"
+     height="40"
+     width="560"
+     name="fps_subpanel"
+     layout="topleft"
+     left="10"
+     top="5">
+      <text
+       follows="left|top"
+       font="SansSerifHuge"
+       text_color="White"
+       height="20"
+       layout="topleft"
+       left="10"
+       top="8"
+       name="fps_value"
+       width="42">
+          167
+      </text>
+      <text
+       follows="left|top"
+       font="SansSerifLarge"
+       text_color="White"
+       height="20"
+       layout="topleft"
+       left_pad="3"
+       top="13"
+       name="fps_lbl"
+       width="450">
+          frames per second
+      </text>
+      <text
+       follows="left|top"
+       text_color="White"
+       height="20"
+       layout="topleft"
+       left="395"
+       top="7"
+       name="fps_desc1_lbl"
+       width="150">
+        Allow 5-10 seconds for
+      </text>
+      <text
+       follows="left|top"
+       text_color="White"
+       height="20"
+       layout="topleft"
+       top_pad="-3"
+       name="fps_desc2_lbl"
+       width="150">
+        changes to take full effect.
+      </text>
+    </panel>
+  </panel>
+  <panel
+   bevel_style="none"
+   follows="left|top"
+   height="540"
+   width="580"
+   name="panel_performance_main"
+   visible="true"
+   layout="topleft"
+   left="0"   
+   top="60">    
+    <panel
+     bg_alpha_color="PanelGray"
+     background_visible="true"
+     background_opaque="false"
+     border="true"
+     bevel_style="none"
+     follows="left|top"
+     height="50"
+     width="560"
+     name="autoadjustments_subpanel"
+     layout="topleft"
+     left="10"
+     top="5">
+        <text
+         follows="left|top"
+         font="SansSerifBoldLarge"
+         text_color="White"
+         height="20"
+         layout="topleft"
+         left="10"
+         name="auto_adj_lbl"
+         top="7"
+         width="375">
+         Auto-adjust settings (recommended)
+        </text>
+        <text
+         follows="left|top"
+         font="SansSerif"
+         text_color="White"
+         height="20"
+         layout="topleft"
+         left="10"
+         name="auto_adj_desc"
+         top_pad="0"
+         width="485">
+         Allow automatic adjustments to reach your preferred frame rate.
+        </text>
+        <icon
+         height="16"
+         width="16"
+         image_name="Arrow_Right_Off"
+         mouse_opaque="true"
+         name="icon_arrow4"
+         follows="right|top"
+         top="19"
+         right="-20"/>
+    </panel>
+    <panel
+     bg_alpha_color="PanelGray"
+     background_visible="true"
+     background_opaque="false"
+     border="true"
+     bevel_style="none"
+     follows="left|top"
+     height="50"
+     width="560"
+     name="settings_subpanel"
+     layout="topleft"
+     top_pad="10">
+        <text
+         follows="left|top"
+         font="SansSerifLarge"
+         text_color="White"
+         height="20"
+         layout="topleft"
+         left="10"
+         name="settings_lbl"
+         top="7"
+         width="180">
+          Graphics settings
+        </text>
+        <text
+         follows="left|top"
+         font="SansSerif"
+         text_color="White"
+         height="20"
+         layout="topleft"
+         left="10"
+         name="settings_desc"
+         top_pad="0"
+         width="395">
+          Choose settings for distance, water, lighting and more.
+        </text>
+        <icon
+         height="16"
+         width="16"
+         image_name="Arrow_Right_Off"
+         mouse_opaque="true"
+         name="icon_arrow3"
+         follows="right|top"
+         top="19"
+         right="-20"/>
+      </panel>
+    <panel
+     bg_alpha_color="PanelGray"
+     background_visible="true"
+     background_opaque="false"
+     border="true"
+     bevel_style="none"
+     follows="left|top"
+     height="50"
+     width="560"
+     name="nearby_subpanel"
+     layout="topleft"
+     top_pad="10">
+      <text
+       follows="left|top"
+       font="SansSerifLarge"
+       text_color="White"
+       height="20"
+       layout="topleft"
+       left="10"
+       name="avatars_nearby_lbl"
+       top="7"
+       width="205">
+          Avatars nearby
+      </text>
+      <text
+       follows="left|top"
+       font="SansSerif"
+       text_color="White"
+       height="20"
+       layout="topleft"
+       left="10"
+       name="avatars_nearby_desc"
+       top_pad="0"
+       width="395">
+          Manage which nearby avatars are fully displayed.
+      </text>
+      <icon
+       height="16"
+       width="16"
+       image_name="Arrow_Right_Off"
+       mouse_opaque="true"
+       name="icon_arrow2"
+       follows="right|top"
+       top="19"
+       right="-20"/>
+    </panel>
+    <panel
+     bg_alpha_color="PanelGray"
+     background_visible="true"
+     background_opaque="false"
+     border="true"
+     bevel_style="none"
+     follows="left|top"
+     height="50"
+     width="560"
+     name="complexity_subpanel"
+     layout="topleft"
+     top_pad="10">
+      <text
+       follows="left|top"
+       font="SansSerifLarge"
+       text_color="White"
+       height="20"
+       layout="topleft"
+       left="10"
+       name="complexity_lbl"
+       top="7"
+       width="180">
+          Your avatar complexity
+      </text>
+      <text
+       follows="left|top"
+       font="SansSerif"
+       text_color="White"
+       height="20"
+       layout="topleft"
+       left="10"
+       name="complexity_info"
+       top_pad="0"
+       width="455">
+          Reduce the complexity of your avatar if you aren't satisfied with current FPS.
+      </text>
+      <icon
+       height="16"
+       width="16"
+       image_name="Arrow_Right_Off"
+       mouse_opaque="true"
+       name="icon_arrow4"
+       follows="right|top"
+       top="19"
+       right="-20"/>
+    </panel>
+    <panel
+     bg_alpha_color="PanelGray"
+     background_visible="true"
+     background_opaque="false"
+     border="true"
+     bevel_style="none"
+     follows="left|top"
+     height="50"
+     width="560"
+     name="huds_subpanel"
+     layout="topleft"
+     top_pad="10">
+      <text
+       follows="left|top"
+       font="SansSerifLarge"
+       text_color="White"
+       height="20"
+       layout="topleft"
+       left="10"
+       name="huds_lbl"
+       top="7"
+       width="135">
+          Your active HUDs
+      </text>
+      <text
+       follows="left|top"
+       font="SansSerif"
+       text_color="White"
+       height="20"
+       layout="topleft"
+       left="10"
+       name="huds_desc"
+       top_pad="0"
+       width="395">
+          Removing HUDs you are not using can improve speed.
+      </text>
+      <icon
+       height="16"
+       width="16"
+       image_name="Arrow_Right_Off"
+       mouse_opaque="true"
+       name="icon_arrow4"
+       follows="right|top"
+       top="19"
+       right="-20"/>
+    </panel>
+  </panel>
+  <panel
+    filename="panel_performance_nearby.xml"
+    follows="all"
+    layout="topleft"
+    left="0"
+    name="panel_performance_nearby"
+    visible="false"
+    top="55" />
+  <panel
+    filename="panel_performance_complexity.xml"
+    follows="all"
+    layout="topleft"
+    left="0"
+    name="panel_performance_complexity"
+    visible="false"
+    top="55" />
+  <panel
+    filename="panel_performance_preferences.xml"
+    follows="all"
+    layout="topleft"
+    left="0"
+    name="panel_performance_preferences"
+    visible="false"
+    top="55" />
+  <panel
+    filename="panel_performance_huds.xml"
+    follows="all"
+    layout="topleft"
+    left="0"
+    name="panel_performance_huds"
+    visible="false"
+    top="55" />
+  <panel
+    filename="panel_performance_autoadjustments.xml"
+    follows="all"
+    layout="topleft"
+    left="0"
+    name="panel_performance_autoadjustments"
+    visible="false"
+    top="55" />
+</floater>
diff --git a/indra/newview/skins/default/xui/en/floater_preferences_graphics_advanced.xml b/indra/newview/skins/default/xui/en/floater_preferences_graphics_advanced.xml
index 22e889a99c..fd80673903 100644
--- a/indra/newview/skins/default/xui/en/floater_preferences_graphics_advanced.xml
+++ b/indra/newview/skins/default/xui/en/floater_preferences_graphics_advanced.xml
@@ -39,7 +39,8 @@
     max_val="512"
     name="DrawDistance"
     top_delta="16"
-    width="330" />
+    width="330">
+    </slider>
   <text
     type="string"
     length="1"
@@ -459,8 +460,8 @@
     label_width="185"
     layout="topleft"
     left="420"
-    min_val="1"
-    max_val="2"
+    min_val="0"
+    max_val="4"
     name="ObjectMeshDetail"
     show_text="false"
     top_delta="16"
diff --git a/indra/newview/skins/default/xui/en/floater_scene_load_stats.xml b/indra/newview/skins/default/xui/en/floater_scene_load_stats.xml
index 2abd8ec5c0..37efbe654e 100644
--- a/indra/newview/skins/default/xui/en/floater_scene_load_stats.xml
+++ b/indra/newview/skins/default/xui/en/floater_scene_load_stats.xml
@@ -410,6 +410,59 @@
           </stat_view>
 			  </stat_view>
 		  </stat_view>
+      <stat_view 
+        name="frame_stats"
+        label="Frame breakdown"
+        show_label="true">
+          <stat_bar name="packet_loss"
+            label="Scenery"
+            orientation="horizontal"
+            unit_label=" %"
+            stat="scenery_frame_pct"
+            bar_max="100"
+            tick_spacing="0.5"
+            show_bar="false"/>
+          <stat_bar name="packet_loss"
+            label="Avatar"
+            orientation="horizontal"
+            unit_label=" %"
+            stat="avatar_frame_pct"
+            bar_max="100"
+            tick_spacing="0.5"
+            show_bar="false"/>
+          <stat_bar name="packet_loss"
+            label="UI"
+            orientation="horizontal"
+            unit_label=" %"
+            stat="ui_frame_pct"
+            bar_max="100"
+            tick_spacing="0.5"
+            show_bar="false"/>
+          <stat_bar name="packet_loss"
+            label="HUDs"
+            orientation="horizontal"
+            unit_label=" %"
+            stat="huds_frame_pct"
+            bar_max="100"
+            tick_spacing="0.5"
+            show_bar="false"/>
+        <stat_bar name="packet_loss"
+            label="Swap"
+            orientation="horizontal"
+            unit_label=" %"
+            stat="swap_frame_pct"
+            bar_max="100"
+            tick_spacing="0.5"
+            show_bar="false"/>
+        <stat_bar name="packet_loss"
+            label="Tasks"
+            orientation="horizontal"
+            unit_label=" %"
+            stat="idle_frame_pct"
+            bar_max="100"
+            tick_spacing="0.5"
+            show_bar="false"/>
+      </stat_view>
     </container_view>
   </scroll_container>
 </floater>
diff --git a/indra/newview/skins/default/xui/en/menu_attachment_other.xml b/indra/newview/skins/default/xui/en/menu_attachment_other.xml
index 7ad692038e..22006c287f 100644
--- a/indra/newview/skins/default/xui/en/menu_attachment_other.xml
+++ b/indra/newview/skins/default/xui/en/menu_attachment_other.xml
@@ -131,22 +131,12 @@
 
    <menu_item_separator />
       <context_menu
-       label="Render Avatar"
+       label="Display this avatar"
        layout="topleft"
-        name="Render Avatar">
-      <menu_item_check
-        name="RenderNormally"
-        label="Default">
-        <menu_item_check.on_check
-          function="Avatar.CheckImpostorMode"
-          parameter="0" />
-	    <menu_item_check.on_click
-	      function="Avatar.SetImpostorMode"
-	      parameter="0" />
-      </menu_item_check>
+       name="Render Avatar">
       <menu_item_check
         name="AlwaysRenderFully"
-        label="Always">
+        label="Always full detail">
         <menu_item_check.on_check
           function="Avatar.CheckImpostorMode"
           parameter="2" />
@@ -156,7 +146,7 @@
       </menu_item_check>
       <menu_item_check
         name="DoNotRender"
-        label="Never">
+        label="Never full detail">
         <menu_item_check.on_check
           function="Avatar.CheckImpostorMode"
           parameter="1" />
@@ -164,6 +154,16 @@
 	      function="Avatar.SetImpostorMode"
 	      parameter="1" />
       </menu_item_check>
+      <menu_item_call
+        name="RenderNormally"
+        label="Remove from exceptions">
+          <menu_item_call.on_visible
+            function="Avatar.CheckImpostorMode"
+            parameter="4" />
+          <menu_item_call.on_click
+            function="Avatar.SetImpostorMode"
+            parameter="0" />
+      </menu_item_call>
       <menu_item_separator />
       <menu_item_call
         label="Exceptions..."
diff --git a/indra/newview/skins/default/xui/en/menu_avatar_other.xml b/indra/newview/skins/default/xui/en/menu_avatar_other.xml
index acbb9b860d..665eb9a82f 100644
--- a/indra/newview/skins/default/xui/en/menu_avatar_other.xml
+++ b/indra/newview/skins/default/xui/en/menu_avatar_other.xml
@@ -122,39 +122,39 @@
    <menu_item_separator />
     
  <context_menu
-       label="Render Avatar"
+       label="Display this avatar"
        layout="topleft"
-        name="Render Avatar">
-      <menu_item_check
-        name="RenderNormally"
-        label="Default">
-        <menu_item_check.on_check
-          function="Avatar.CheckImpostorMode"
-          parameter="0" />
-	    <menu_item_check.on_click
-	      function="Avatar.SetImpostorMode"
-	      parameter="0" />
-      </menu_item_check>
-      <menu_item_check
-        name="AlwaysRenderFully"
-        label="Always">
-        <menu_item_check.on_check
-          function="Avatar.CheckImpostorMode"
-          parameter="2" />
-	    <menu_item_check.on_click
-	      function="Avatar.SetImpostorMode"
-	      parameter="2" />
-      </menu_item_check>
-      <menu_item_check
-        name="DoNotRender"
-        label="Never">
-        <menu_item_check.on_check
-          function="Avatar.CheckImpostorMode"
-          parameter="1" />
-	    <menu_item_check.on_click
-	      function="Avatar.SetImpostorMode"
-	      parameter="1" />
-      </menu_item_check>
+       name="Render Avatar">
+       <menu_item_check
+         name="AlwaysRenderFully"
+         label="Always full detail">
+         <menu_item_check.on_check
+           function="Avatar.CheckImpostorMode"
+           parameter="2" />
+         <menu_item_check.on_click
+           function="Avatar.SetImpostorMode"
+           parameter="2" />
+       </menu_item_check>
+       <menu_item_check
+         name="DoNotRender"
+         label="Never full detail">
+         <menu_item_check.on_check
+           function="Avatar.CheckImpostorMode"
+           parameter="1" />
+         <menu_item_check.on_click
+           function="Avatar.SetImpostorMode"
+           parameter="1" />
+       </menu_item_check>
+       <menu_item_call
+         name="RenderNormally"
+         label="Remove from exceptions">
+         <menu_item_call.on_visible
+           function="Avatar.CheckImpostorMode"
+           parameter="4" />
+         <menu_item_call.on_click
+           function="Avatar.SetImpostorMode"
+           parameter="0" />
+       </menu_item_call>
       <menu_item_separator />
       <menu_item_call
         label="Exceptions..."
diff --git a/indra/newview/skins/default/xui/en/menu_avatar_rendering_settings.xml b/indra/newview/skins/default/xui/en/menu_avatar_rendering_settings.xml
index 5163cd3115..1a18483418 100644
--- a/indra/newview/skins/default/xui/en/menu_avatar_rendering_settings.xml
+++ b/indra/newview/skins/default/xui/en/menu_avatar_rendering_settings.xml
@@ -3,24 +3,25 @@
  layout="topleft"
  name="Settings">
     <menu_item_check
-     label="Default"
-     layout="topleft"
-     name="default">
-        <on_click function="Settings.SetRendering" parameter="default"/>
-	<on_check function="Settings.IsSelected" parameter="default" />  
-    </menu_item_check>
-    <menu_item_check
-     label="Always render"
+     label="Always full detail"
      layout="topleft"
      name="always_render">
         <on_click function="Settings.SetRendering" parameter="always"/>
-	<on_check function="Settings.IsSelected" parameter="always" />  
+        <on_check function="Settings.IsSelected" parameter="always" />  
     </menu_item_check>
     <menu_item_check
-     label="Never render"
+     label="Never full detail"
      layout="topleft"
      name="never_render">
         <on_click function="Settings.SetRendering" parameter="never"/>
-	<on_check function="Settings.IsSelected" parameter="never" />  
-    </menu_item_check>  
+        <on_check function="Settings.IsSelected" parameter="never" />
+    </menu_item_check>
+    <menu_item_check
+     label="Remove from exceptions"
+     layout="topleft"
+     name="default">
+        <on_click function="Settings.SetRendering" parameter="default"/>
+        <on_check function="Settings.IsSelected" parameter="default" />
+        <on_visible function="Settings.IsSelected" parameter="non_default" />
+  </menu_item_check>
 </context_menu>
diff --git a/indra/newview/skins/default/xui/en/menu_avatar_rendering_settings_add.xml b/indra/newview/skins/default/xui/en/menu_avatar_rendering_settings_add.xml
index c64b24ed70..6e09eb5981 100644
--- a/indra/newview/skins/default/xui/en/menu_avatar_rendering_settings_add.xml
+++ b/indra/newview/skins/default/xui/en/menu_avatar_rendering_settings_add.xml
@@ -4,13 +4,13 @@
      left="0" bottom="0" visible="false"
      mouse_opaque="false">
   <menu_item_call
-   label="Always Render a Resident..."
+   label="Always full detail..."
    name="add_avatar_always_render">
       <on_click
        function="Settings.AddNewEntry" parameter="always"/>
   </menu_item_call>
   <menu_item_call
-   label="Never Render a Resident..."
+   label="Never full detail..."
    name="add_avatar_never_render">
       <on_click
        function="Settings.AddNewEntry"  parameter="never"/>
diff --git a/indra/newview/skins/default/xui/en/menu_viewer.xml b/indra/newview/skins/default/xui/en/menu_viewer.xml
index 3e07daa91b..df067d2b88 100644
--- a/indra/newview/skins/default/xui/en/menu_viewer.xml
+++ b/indra/newview/skins/default/xui/en/menu_viewer.xml
@@ -862,7 +862,16 @@
                parameter="UseDebugMenus" />
           </menu_item_check>
         </menu>
-
+        <menu_item_check
+          label="Improve graphics speed..."
+          name="Performance">
+          <menu_item_check.on_click
+           function="Floater.Toggle"
+           parameter="performance" />
+          <menu_item_check.on_check
+           function="Floater.Visible"
+           parameter="performance" />
+        </menu_item_check>
         <menu_item_separator/>
     <!--    <menu_item_check
          label="Show Navigation Bar"
diff --git a/indra/newview/skins/default/xui/en/notifications.xml b/indra/newview/skins/default/xui/en/notifications.xml
index bf67118eac..4949075f2d 100644
--- a/indra/newview/skins/default/xui/en/notifications.xml
+++ b/indra/newview/skins/default/xui/en/notifications.xml
@@ -1900,6 +1900,41 @@ Graphics Quality can be raised in Preferences &gt; Graphics.
 
   <notification
    icon="alertmodal.tga"
+   name="AutoFPSConfirmDisable"
+   type="alertmodal">
+Changing this setting will disable automatic adjustment and turn off 'Automatic settings'.
+Are you sure you want to continue?
+    <tag>confirm</tag>
+    <usetemplate
+     name="okcancelbuttons"
+     notext="Cancel"
+     yestext="Continue"/>
+  </notification>
+  <notification
+   icon="alertmodal.tga"
+   name="AdvancedLightingConfirm"
+   type="alertmodal">
+To turn on advanced lighting, we need to increase quality to level 4.
+    <tag>confirm</tag>
+  <usetemplate
+   name="okcancelbuttons"
+   notext="Cancel"
+   yestext="OK"/>
+  </notification>
+  <notification
+ icon="alertmodal.tga"
+   name="ShadowsConfirm"
+   type="alertmodal">
+To enable shadows, we need to increase quality to level 4.
+    <tag>confirm</tag>
+    <usetemplate
+     name="okcancelbuttons"
+     notext="Cancel"
+     yestext="OK"/>
+  </notification>
+
+  <notification
+   icon="alertmodal.tga"
    name="RegionNoTerraforming"
    type="alertmodal">
 The region [REGION] does not allow terraforming.
@@ -12029,6 +12064,20 @@ If you want others to see this object, remove it and re-attach it to an avatar a
         yestext="OK"/>
   </notification>
 
+  <notification
+   icon="alertmodal.tga"
+   name="EnableAutoFPSWarning"
+   type="alertmodal">
+You are about to enable AutoFPS. All unsaved graphics settings will be lost.
+
+Would you like to save them first?
+      <tag>confirm</tag>
+      <usetemplate
+       name="okcancelbuttons"
+       notext="No"
+       yestext="Yes"/>
+  </notification>
+    
 <notification
  icon="notifytip.tga"
  name="MaterialCreated"
diff --git a/indra/newview/skins/default/xui/en/panel_performance_autoadjustments.xml b/indra/newview/skins/default/xui/en/panel_performance_autoadjustments.xml
new file mode 100644
index 0000000000..904ce1cc52
--- /dev/null
+++ b/indra/newview/skins/default/xui/en/panel_performance_autoadjustments.xml
@@ -0,0 +1,387 @@
+<?xml version="1.0" encoding="utf-8" standalone="yes" ?>
+<panel
+ bevel_style="none"
+ follows="left|top"
+ height="580"
+ width="580"
+ name="panel_performance_autoadjustments"
+ layout="topleft"
+ left="0"
+ top="0">
+  <button
+    height="16"
+    width="16"
+    layout="topleft"
+    mouse_opaque="true"
+    follows="left|top"
+    name="back_btn"
+    top="7"
+    image_selected="Arrow_Left_Off"
+    image_pressed="Arrow_Left_Off"
+    image_unselected="Arrow_Left_Off"
+    left="15"
+    is_toggle="true">
+  </button>
+  <text
+   follows="left|top"
+   height="18"
+   layout="topleft"
+   left_pad="0"
+   valign="center"
+   halign="center"
+   top="6"
+   name="back_lbl"
+   width="32">
+    Back
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifLarge"
+   text_color="white"
+   height="20"
+   layout="topleft"
+   left="20"
+   top_pad="15"
+   name="settings_title"
+   width="300">
+    Auto-adjust settings
+  </text>
+  <button
+   follows="top|left"
+   height="23"
+   label="Reset to recommended settings"
+   layout="topleft"
+   left="360"
+   name="defaults_btn"
+   top_delta="0"
+   width="200"/>
+  <view_border
+   bevel_style="in"
+   height="0"
+   layout="topleft"
+   name="border0"
+   top_pad="15"
+   left="20"
+   width="540"/>
+  <text
+   follows="left|top"
+   font="SansSerif"
+   text_color="White"
+   height="20"
+   layout="topleft"
+   left="20"
+   name="targetfps_desc"
+   wrap="true"
+   width="115"
+   top_pad="20">
+    Desired frame rate
+  </text>
+  <spinner
+   name="target_fps"
+   control_name="TargetFPS"
+   font="SansSerifLarge"
+   tool_tip="The viewer will attempt to achieve this by adjusting your graphics settings."
+   layout="topleft"
+   follows="left|top"
+   left_pad="25"
+   top_delta="0"
+   height="25"
+   visible="true"
+   decimal_digits="0"
+   increment="1"
+   initial_value="25"
+   max_val="300"
+   min_val="1"
+   width="48"
+   label_width="0" />
+ <text
+   follows="left|top"
+   text_color="White"
+   height="20"
+   layout="topleft"
+   name="display_desc"
+   top_delta="5"
+   left_pad="15"
+   wrap="true"
+   width="225">
+  Your display supports up to [FPS_LIMIT] fps.
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerif"
+   text_color="White"
+   height="20"
+   layout="topleft"
+   left="20"
+   name="settings_desc"
+   top_pad="15"
+   wrap="true"
+   width="115">
+    Settings affect
+  </text>
+  <combo_box
+   follows="top|left"
+   font="SansSerif"
+   height="20"
+   layout="topleft"
+   left_pad="25"
+   control_name="TuningFPSStrategy"
+   name="TuningFPSStrategy"
+   width="160">
+    <combo_box.item
+     label="Avatars Only"
+     name="av_only"
+     value="0" />
+    <combo_box.item
+     label="Avatars and World"
+     name="av_and_scene"
+     value="1" />
+	<combo_box.item
+     label="World Only"
+     name="scene_only"
+     value="2" />
+  </combo_box>
+  <button
+   follows="top|left"
+   height="22"
+   image_pressed="PushButton_Press"
+   image_pressed_selected="PushButton_Selected_Press"
+   image_selected="PushButton_Selected_Press"
+   label="Auto-adjust now"
+   layout="topleft"
+   top_pad="15"
+   left="20"
+   name="start_autotune"
+   tool_tip="The viewer will attempt to adjust settings to meet the target FPS then stop."
+   width="124"/>
+  <button
+   follows="top|left"
+   height="22"
+   image_pressed="PushButton_Press"
+   image_pressed_selected="PushButton_Selected_Press"
+   image_selected="PushButton_Selected_Press"
+   label="Cancel"
+   layout="topleft"
+   left_pad="15"
+   name="stop_autotune"
+   tool_tip="Stop adjusting settings."
+   width="90"/>
+  <text
+   follows="left|top"
+   text_color="Yellow"
+   height="20"
+   layout="topleft"
+   name="wip_desc"
+   top_delta="5"
+   left_pad="20"
+   wrap="true"
+   width="115">
+  Working on it...
+  </text>
+  <check_box
+   control_name="AutoTuneLock"
+   follows="top|left"
+   height="20"
+   initial_value="true"
+   image_pressed="PushButton_Press"
+   image_pressed_selected="PushButton_Selected_Press"
+   image_selected="PushButton_Selected_Press"
+   is_toggle="true"
+   label="Adjust continuously"
+   layout="topleft"
+   left="17"
+   top_pad="10"
+   name="AutoTuneContinuous"
+   tool_tip="The viewer will continually adapt the settings to meet the target FPS until stopped even with the floater closed."
+   width="64">
+  </check_box>
+  <radio_group
+   control_name="KeepAutoTuneLock"
+   enabled_control="AutoTuneLock"
+   height="50"
+   layout="topleft"
+   follows="top|left"
+   name="autotune_lock_type"
+   top_pad="5"
+   left_delta="15"
+   width="120">
+    <radio_item
+     height="16"
+     label="This login session only"
+     layout="topleft"
+     name="one_session_lock"
+     value="0"
+     width="120" />
+    <radio_item
+     height="16"
+     label="Future login sessions"
+     layout="topleft"
+     name="next_session_lock"
+     value="1"
+     width="120" />
+  </radio_group>
+  <view_border
+   bevel_style="in"
+   height="0"
+   layout="topleft"
+   name="border_vsync"
+   top_pad="3"
+   left="20"
+   width="540"/>
+  <check_box
+   control_name="RenderVSyncEnable"
+   height="16"
+   left="17"
+   initial_value="true"
+   label="Enable VSync"
+   label_text.text_color="White"
+   layout="topleft"
+   top_pad="12"
+   name="vsync"
+   tool_tip="Enable Vertical synchronization to reduce screen tearing and stuttering."
+   width="315" />
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   left="20"
+   top_pad="15"
+   name="vsync_desc"
+   width="580">
+    Matches monitor refresh rate with frame rate.
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   top_pad="3"
+   left="20"
+   name="vsync_desc_limit"
+   width="580">
+    Note: Turning on VSync limits frame rate to [FPS_LIMIT] fps.
+  </text>
+  <view_border
+   bevel_style="in"
+   height="0"
+   layout="topleft"
+   name="border1"
+   top_pad="10"
+   left="20"
+   width="540"/>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   left="20"
+   top_pad="15"
+   name="simplify_dist_desc"
+   width="580">
+    Reducing detail shown on avatars that are far away will improve graphics speed.
+  </text>
+  <check_box
+   control_name="AutoTuneImpostorByDistEnabled"
+   height="19"
+   label="Simplify avatars beyond"
+   label_text.text_color="White"
+   layout="topleft"
+   follows="top|left"
+   name="AutoTuneImpostorByDistEnabled"
+   tool_tip="When enabled the viewer will adjust the MaxNonImpostors setting to limit fully rendered avatars to those within the defined radius."
+   top_pad="15"
+   width="190" />
+  <spinner
+   control_name="AutoTuneImpostorFarAwayDistance"
+   height="20"
+   layout="topleft"
+   follows="top|left"
+   name="ffa_autotune"
+   left_pad="20"
+   decimal_digits="2"
+   min_val="16"
+   max_val="256"
+   width="60" >
+  </spinner>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   left_pad="10"
+   name="dist_meters"
+   width="70">
+    meters
+  </text>
+  <view_border
+   bevel_style="in"
+   height="0"
+   layout="topleft"
+   name="border2"
+   top_pad="20"
+   left="20"
+   width="540"/>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   left="20"
+   top_pad="15"
+   name="dist_limits_desc"
+   width="580">
+    Choose the distance range that automatic settings will affect.
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   top_pad="15"
+   name="min_dist_lbl"
+   width="120">
+    Minimum distance
+  </text>
+  <spinner
+   control_name="AutoTuneRenderFarClipMin"
+   height="20"
+   layout="topleft"
+   left_pad="15"
+   follows="top|left"
+   name="min_dd_autotune"
+   decimal_digits="2"
+   min_val="32"
+   max_val="256"
+   width="60">
+  </spinner>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   top_pad="15"
+   left="20"
+   name="pref_dist_lbl"
+   width="120">
+    Maximum distance
+  </text>
+  <spinner
+   control_name="AutoTuneRenderFarClipTarget"
+   height="20"
+   layout="topleft"
+   follows="top|left"
+   name="pref_dd_autotune"
+   left_pad="15"
+   min_val="32"
+   max_val="256"
+   width="60">
+  </spinner>
+</panel>
diff --git a/indra/newview/skins/default/xui/en/panel_performance_complexity.xml b/indra/newview/skins/default/xui/en/panel_performance_complexity.xml
new file mode 100644
index 0000000000..cd3f610a92
--- /dev/null
+++ b/indra/newview/skins/default/xui/en/panel_performance_complexity.xml
@@ -0,0 +1,106 @@
+<?xml version="1.0" encoding="utf-8" standalone="yes" ?>
+<panel
+ bevel_style="none"
+ follows="left|top"
+ height="580"
+ width="580"
+ name="panel_performance_complexity"
+ layout="topleft"
+ left="0"
+ top="0">
+  <button
+    height="16"
+    width="16"
+    layout="topleft"
+    mouse_opaque="true"
+    follows="left|top"
+    name="back_btn"
+    top="7"
+    image_selected="Arrow_Left_Off"
+    image_pressed="Arrow_Left_Off"
+    image_unselected="Arrow_Left_Off"
+    left="15"
+    is_toggle="true">
+  </button>
+  <text
+   follows="left|top"
+   height="18"
+   layout="topleft"
+   left_pad="0"
+   valign="center"
+   halign="center"
+   top="6"
+   name="back_lbl"
+   width="32">
+    Back
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifLarge"
+   text_color="white"
+   height="20"
+   layout="topleft"
+   left="20"
+   top_pad="15"
+   name="attachments_title"
+   width="195">
+    Your avatar complexity 
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   top_pad="5"
+   left="20"
+   name="attachments_desc1"
+   width="580">
+    Attachments make your avatar more complex. If your avatar is very complex, some other 
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   top_pad="3"
+   left="20"
+   name="attachments_desc2"
+   width="580">
+    people may not see you in full detail, and your graphics speed may be reduced. Removing
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   top_pad="3"
+   left="20"
+   name="attachments_desc3"
+   width="580">
+    heavy attachments that you don’t need can help.
+  </text>
+  <name_list
+    column_padding="0"
+    draw_stripes="true"
+    height="429"
+    follows="left|top"
+    layout="topleft"
+    name="obj_list"
+    top_pad="10"
+    width="540">
+      <name_list.columns
+       label=""
+       name="complex_visual"
+       width="90" />
+      <name_list.columns
+       label=""
+       name="complex_value"
+       width="40" />
+      <name_list.columns
+       label=""
+       name="name"/>
+  </name_list>
+</panel>
diff --git a/indra/newview/skins/default/xui/en/panel_performance_huds.xml b/indra/newview/skins/default/xui/en/panel_performance_huds.xml
new file mode 100644
index 0000000000..2fddcb3b9e
--- /dev/null
+++ b/indra/newview/skins/default/xui/en/panel_performance_huds.xml
@@ -0,0 +1,95 @@
+<?xml version="1.0" encoding="utf-8" standalone="yes" ?>
+<panel
+ bevel_style="none"
+ follows="left|top"
+ height="580"
+ width="580"
+ name="panel_performance_huds"
+ layout="topleft"
+ left="0"
+ top="0">
+  <button
+    height="16"
+    width="16"
+    layout="topleft"
+    mouse_opaque="true"
+    follows="left|top"
+    name="back_btn"
+    top="7"
+    image_selected="Arrow_Left_Off"
+    image_pressed="Arrow_Left_Off"
+    image_unselected="Arrow_Left_Off"
+    left="15"
+    is_toggle="true">
+  </button>
+  <text
+   follows="left|top"
+   height="18"
+   layout="topleft"
+   left_pad="0"
+   valign="center"
+   halign="center"
+   top="6"
+   name="back_lbl"
+   width="32">
+    Back
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifLarge"
+   text_color="White"
+   height="20"
+   layout="topleft"
+   left="20"
+   top_pad="15"
+   name="huds_title"
+   width="135">
+    Your active HUDs
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   top_pad="5"
+   left="20"
+   name="huds_desc1"
+   width="540">
+    Detaching HUDs you aren't using saves memory and can make Second Life run faster.
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   top_pad="3"
+   left="20"
+   name="huds_desc2"
+   width="540">
+    Note: Using a HUD's minimize button does not detach it. 
+  </text>
+  <name_list
+    column_padding="0"
+    draw_stripes="true"
+    height="450"
+    follows="left|top"
+    layout="topleft"
+    name="hud_list"
+    top_pad="10"
+    width="540">
+        <name_list.columns
+         label=""
+         name="complex_visual"
+         width="90" />
+        <name_list.columns
+         label=""
+         name="complex_value"
+         width="40" />
+        <name_list.columns
+         label=""
+         name="name"/>
+  </name_list>
+</panel>
+
diff --git a/indra/newview/skins/default/xui/en/panel_performance_nearby.xml b/indra/newview/skins/default/xui/en/panel_performance_nearby.xml
new file mode 100644
index 0000000000..cb795e59a9
--- /dev/null
+++ b/indra/newview/skins/default/xui/en/panel_performance_nearby.xml
@@ -0,0 +1,216 @@
+<?xml version="1.0" encoding="utf-8" standalone="yes" ?>
+<panel
+ bevel_style="none"
+ follows="left|top"
+ height="530"
+ width="580"
+ name="panel_performance_nearby"
+ layout="topleft"
+ left="0"
+ top="0">
+  <button
+    height="16"
+    width="16"
+    layout="topleft"
+    mouse_opaque="true"
+    follows="left|top"
+    name="back_btn"
+    top="7"
+    image_selected="Arrow_Left_Off"
+    image_pressed="Arrow_Left_Off"
+    image_unselected="Arrow_Left_Off"
+    left="15"
+    is_toggle="true">
+  </button>
+  <text
+   follows="left|top"
+   height="18"
+   layout="topleft"
+   left_pad="0"
+   valign="center"
+   halign="center"
+   top="6"
+   name="back_lbl"
+   width="32">
+    Back
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifLarge"
+   text_color="White"
+   height="20"
+   layout="topleft"
+   left="20"
+   top_pad="15"
+   name="av_nearby_title"
+   width="205">
+    Avatars nearby
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   left="20"
+   top_pad="5"
+   name="av_nearby_desc"
+   width="580">
+    Hide the most complex avatars to boost speed.
+  </text>
+  <slider
+    control_name="RenderAvatarMaxART"
+    tool_tip="Controls when a visually complex avatar is considered to be taking too long to render (unit: microseconds)"
+    follows="left|top"
+    height="16"
+    initial_value="4.7"
+    increment="0.01"
+    label="Maximum render time (μs)"
+    text_color="White"
+    label_width="165"
+    layout="topleft"
+    min_val="2"
+    max_val="4.7"
+    name="RenderAvatarMaxART"
+    show_text="false"
+    top_pad="10"
+    width="490">
+  </slider>
+  <text
+    type="string"
+    length="1"
+    follows="left|top"
+    height="16"
+    layout="topleft"
+    top_delta="0"
+    left_pad="5"
+    text_color="White"
+    name="RenderAvatarMaxARTText"
+    width="65">
+    no limit
+  </text>
+  <name_list
+    column_padding="0"
+    draw_stripes="true"
+    height="280"
+    left="20"
+    follows="left|top"
+    layout="topleft"
+    sort_column="complex_value"
+    short_names="true"
+    name="nearby_list"
+    name_column="name"
+    top_pad="10"
+    width="540">
+        <name_list.columns
+         label=""
+         name="complex_visual"
+         width="90" />
+        <name_list.columns
+         label=""
+         name="complex_value"
+         width="50" />
+        <name_list.columns
+         label=""
+         name="name"/>
+  </name_list>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   left="20"
+   top_pad="10"
+   name="av_nearby_desc2"
+   width="580">
+     You can also right-click on an avatar in-world to control display.
+  </text>
+  <button
+    height="23"
+    label="Exceptions..."
+    layout="topleft"
+    left="460"
+    top_delta="2"
+    name="exceptions_btn"
+    width="100">
+  </button>
+  <check_box
+    control_name="AlwaysRenderFriends"
+    height="16"
+    initial_value="true"
+    label="Always display friends in full detail"
+    label_text.text_color="White"
+    layout="topleft"
+    name="display_friends"
+    top_pad="3"
+    left="18"
+    width="256">
+  </check_box>
+  <view_border
+    bevel_style="in"
+    height="0"
+    layout="topleft"
+    name="border"
+    top_pad="15"
+    left="20"
+    width="540"/>
+  <check_box
+    height="16"
+    initial_value="true"
+    label="Hide avatars completely (good for landscape photos)"
+    layout="topleft"
+    name="hide_avatars"
+    top_delta="15"
+    left="18"
+    width="280">
+   </check_box>
+  <text
+   type="string"
+   length="1"
+   follows="left|top"
+   height="15"
+   layout="topleft"
+   left="20"
+   name="name_tags_textbox"
+   top_pad="10"
+   width="400">
+    Name tags:
+  </text>
+  <radio_group
+    control_name="AvatarNameTagMode"
+    height="20"
+    layout="topleft"
+    left="120"
+    top_delta="0"
+    name="name_tag_mode">
+    <radio_item
+     label="Off"
+     name="radio"
+     top_delta="20"
+     layout="topleft"
+     height="16"
+     left="0"
+     value="0"
+     width="75" />
+    <radio_item
+     label="On"
+     left_pad="0"
+     layout="topleft"
+     top_delta="0"
+     height="16"
+     name="radio2"
+     value="1"
+     width="75" />
+    <radio_item
+     label="Show briefly"
+     left_pad="0"
+     name="radio3"
+     height="16"
+     layout="topleft"
+     top_delta="0"
+     value="2"
+     width="160" />
+  </radio_group>
+ 
+</panel>
diff --git a/indra/newview/skins/default/xui/en/panel_performance_preferences.xml b/indra/newview/skins/default/xui/en/panel_performance_preferences.xml
new file mode 100644
index 0000000000..b52c19d5e3
--- /dev/null
+++ b/indra/newview/skins/default/xui/en/panel_performance_preferences.xml
@@ -0,0 +1,565 @@
+<?xml version="1.0" encoding="utf-8" standalone="yes" ?>
+<panel
+ bevel_style="none"
+ follows="left|top"
+ height="580"
+ width="580"
+ name="panel_performance_preferences"
+ layout="topleft"
+ left="0"
+ top="0">
+  <button
+    height="16"
+    width="16"
+    layout="topleft"
+    mouse_opaque="true"
+    follows="left|top"
+    name="back_btn"
+    top="7"
+    image_selected="Arrow_Left_Off"
+    image_pressed="Arrow_Left_Off"
+    image_unselected="Arrow_Left_Off"
+    left="15"
+    is_toggle="true">
+  </button>
+  <text
+   follows="left|top"
+   height="18"
+   layout="topleft"
+   left_pad="0"
+   valign="center"
+   halign="center"
+   top="6"
+   name="back_lbl"
+   width="32">
+    Back
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifLarge"
+   text_color="white"
+   height="20"
+   layout="topleft"
+   left="20"
+   top_pad="15"
+   name="settings_title"
+   width="300">
+    Graphics settings
+  </text>
+  <button
+   follows="top|left"
+   height="23"
+   label="Open Advanced Settings"
+   layout="topleft"
+   left="360"
+   name="advanced_btn"
+   top_delta="-35"
+   width="200"/>
+  <button
+   follows="top|left"
+   height="23"
+   label="Reset to recommended settings"
+   layout="topleft"
+   left="350"
+   name="defaults_btn"
+   top_pad="10"
+   width="210"/>
+  <view_border
+   bevel_style="in"
+   height="0"
+   layout="topleft"
+   name="border0"
+   top_pad="8"
+   left="20"
+   width="540"/>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   top_pad="30"
+   name="quality_lbl"
+   width="100">
+    Quality &amp; Speed
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   left_pad="40"
+   name="fastest_lbl"
+   width="40">
+    Fastest
+  </text>
+  <radio_group
+   control_name="RenderQualityPerformance"
+   follows="top|left"
+   draw_border="false"
+   height="25"
+   layout="topleft"
+   left_pad="5"
+   name="graphics_quality"
+   top_delta="0"
+   width="243">
+    <radio_item
+     height="16"
+     layout="topleft"
+     left="3"
+     name="0"
+     top="0"
+     width="7" />
+    <radio_item
+     height="16"
+     layout="topleft"
+     left_pad="30"
+     name="1"
+     width="7" />
+    <radio_item
+     height="16"
+     layout="topleft"
+     left_pad="30"
+     name="2"
+     width="7" />
+    <radio_item
+     height="16"
+     layout="topleft"
+     left_pad="30"
+     name="3"
+     width="7" />
+    <radio_item
+     height="16"
+     layout="topleft"
+     left_pad="30"
+     name="4"
+     width="7" />
+    <radio_item
+     height="16"
+     layout="topleft"
+     left_pad="30"
+     name="5"
+     width="7" />
+    <radio_item
+     height="16"
+     layout="topleft"
+     left_pad="30"
+     name="6"
+     width="7" />
+  </radio_group>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   left_pad="10"
+   top_delta="1"
+   name="quality_lbl"
+   width="70">
+    Best quality
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   top_pad="15"
+   left="160"
+   name="quality_desc"
+   width="380">
+    Choosing a shortcut will reset all manual changes you have made.
+  </text>
+  <view_border
+    bevel_style="in"
+    height="0"
+    layout="topleft"
+    name="border2"
+    top_pad="5"
+    left="20"
+    width="540"/>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   top_pad="20"
+   left="20"
+   name="distance_lbl"
+   width="100">
+    Visibility distance
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   left_pad="40"
+   name="faster_lbl"
+   width="40">
+    Faster
+  </text>
+  <slider
+    control_name="RenderFarClip"
+    decimal_digits="0"
+    follows="left|top"
+    top_delta="-1"
+    height="16"
+    increment="8"
+    initial_value="160"
+    label_width="90"
+    layout="topleft"
+    min_val="64"
+    max_val="512"
+    name="draw_distance"
+    left_pad="5"
+    width="250">
+  </slider>
+  <text
+    type="string"
+    length="1"
+    follows="left|top"
+    height="12"
+    layout="topleft"
+    left_pad="1"
+    top_delta="0"
+    name="draw_distance_m"
+    width="20">
+    m
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   left_pad="10"
+   top_delta="1"
+   name="farther_lbl"
+   width="40">
+    Farther
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   top_pad="15"
+   left="160"
+   name="distance_desc1"
+   width="350">
+    To see more land when you zoom out, increase the distance.
+  </text>
+  <view_border
+    bevel_style="in"
+    height="0"
+    layout="topleft"
+    name="border3"
+    top_pad="5"
+    left="20"
+    width="540"/>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   top_pad="20"
+   left="20"
+   name="environment_lbl"
+   width="100">
+    Environment
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   top_delta="0"
+   left="160"
+   name="enhancements_desc"
+   width="350">
+    Each enhancement improves realism but can reduce speed.
+  </text>
+  <check_box
+    control_name="WindLightUseAtmosShaders"
+    height="16"
+    initial_value="true"
+    label="Atmospheric shaders"
+    layout="topleft"
+    name="atmospheric_shaders"
+    top_pad="5"
+    left="157"
+    width="280">
+  </check_box>
+  <check_box
+    control_name="RenderDeferred"
+    height="16"
+    initial_value="true"
+    label="Advanced Lighting"
+    layout="topleft"
+    name="advanced_lighting_model"
+    top_delta="24"
+    width="280">
+  </check_box>  
+  <text
+    type="string"
+    length="1"
+    follows="left|top"
+    height="16"
+    layout="topleft"
+    left="160"
+    name="RenderShadowDetailText"
+    text_readonly_color="LabelDisabledColor"
+    top_pad="10"
+    width="128">
+    Shadows:
+  </text>
+  <combo_box
+   control_name="RenderShadowDetail"
+   height="18"
+   layout="topleft"
+   left_delta="150"
+   top_delta="0"
+   name="ShadowDetail"
+   width="150">
+    <combo_box.item
+      label="None"
+      name="0"
+      value="0"/>
+    <combo_box.item
+      label="Sun/Moon"
+      name="1"
+      value="1"/>
+    <combo_box.item
+      label="Sun/Moon + Projectors"
+      name="2"
+      value="2"/>
+  </combo_box>
+  <view_border
+    bevel_style="in"
+    height="0"
+    layout="topleft"
+    name="border3"
+    top_pad="7"
+    left="20"
+    width="540"/>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   top_pad="20"
+   left="20"
+   name="water_lbl"
+   width="100">
+    Water
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   top_delta="0"
+   left="160"
+   name="water_desc"
+   width="380">
+    Reducing or turning off water effects can greatly improve frame rate.
+  </text>
+  <check_box
+    control_name="RenderTransparentWater"
+    height="16"
+    initial_value="true"
+    label="Transparent Water"
+    layout="topleft"
+    name="TransparentWater"
+    top_delta="24"
+    left="157"
+    width="280">
+  </check_box>
+  <text
+    type="string"
+    length="1"
+    follows="left|top"
+    height="16"
+    layout="topleft"
+    name="ReflectionsText"
+    text_readonly_color="LabelDisabledColor"
+    top_pad="16"
+    left="160"
+    width="128">
+    Water Reflections:
+  </text>
+  <combo_box
+    control_name="RenderReflectionDetail"
+    height="18"
+    layout="topleft"
+    left_delta="150"
+    top_delta="0"
+    name="Reflections"
+    width="150">
+    <combo_box.item
+      label="None; opaque"
+      name="0"
+      value="-2"/>
+    <combo_box.item
+      label="None; transparent"
+      name="0"
+      value="-1"/>
+    <combo_box.item
+      label="Minimal"
+      name="0"
+      value="0"/>
+    <combo_box.item
+      label="Terrain and trees"
+      name="1"
+      value="1"/>
+    <combo_box.item
+      label="All static objects"
+      name="2"
+      value="2"/>
+    <combo_box.item
+      label="All avatars and objects"
+      name="3"
+      value="3"/>
+    <combo_box.item
+      label="Everything"
+      name="4"
+      value="4"/>
+  </combo_box>
+  <view_border
+    bevel_style="in"
+    height="0"
+    layout="topleft"
+    name="border4"
+    top_pad="7"
+    left="20"
+    width="540"/>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   top_pad="20"
+   left="20"
+   name="photo_lbl"
+   width="100">
+    Photography
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   text_color="White"
+   height="18"
+   layout="topleft"
+   top_delta="0"
+   left="160"
+   name="photo_desc"
+   width="350">
+    Maximum detail is good for photos, but can slow frame rate.
+  </text>
+  <spinner
+   control_name="RenderVolumeLODFactor"
+   follows="left|top"
+   height="23"
+   increment="0.125"
+   label="Distance detail:"
+   label_width="95"
+   layout="topleft"
+   max_val="4"
+   min_val="0"
+   name="render_volume_lod"
+   top_pad="10"
+   width="150" />
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   height="18"
+   layout="topleft"
+   top_delta="3"
+   left_pad="10"
+   name="photo_desc"
+   width="180">
+      (Enter value between 0.0 and 4.0)
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   height="18"
+   layout="topleft"
+   top="80"
+   left="213"
+   name="1_lbl"
+   width="7">
+    1
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   height="18"
+   layout="topleft"
+   left_pad="31"
+   name="2_lbl"
+   width="7">
+    2
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   height="18"
+   layout="topleft"
+   left_pad="30"
+   name="3_lbl"
+   width="7">
+    3
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   height="18"
+   layout="topleft"
+   left_pad="30"
+   name="4_lbl"
+   width="7">
+    4
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   height="18"
+   layout="topleft"
+   left_pad="30"
+   name="5_lbl"
+   width="7">
+    5
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   height="18"
+   layout="topleft"
+   left_pad="30"
+   name="6_lbl"
+   width="7">
+      6
+  </text>
+  <text
+   follows="left|top"
+   font="SansSerifSmall"
+   height="18"
+   layout="topleft"
+   left_pad="30"
+   name="7_lbl"
+   width="7">
+    7
+  </text>
+</panel>
diff --git a/indra/newview/skins/default/xui/en/panel_preferences_graphics1.xml b/indra/newview/skins/default/xui/en/panel_preferences_graphics1.xml
index 38d364cf9a..74a44b6b09 100644
--- a/indra/newview/skins/default/xui/en/panel_preferences_graphics1.xml
+++ b/indra/newview/skins/default/xui/en/panel_preferences_graphics1.xml
@@ -231,6 +231,18 @@
      m
   </text>
 
+  <button
+  height="23"
+  label="Automatic adjustments settings"
+  layout="topleft"
+  left="30"
+  name="AutoAdjustmentsButton"
+  top_delta="30"
+  width="200">
+    <button.commit_callback
+      function="Pref.AutoAdjustments"/>
+  </button>
+  
   <slider
     control_name="IndirectMaxComplexity"
     tool_tip="Controls at what point a visually complex avatar is drawn as a JellyDoll"
@@ -246,7 +258,7 @@
     max_val="101"
     name="IndirectMaxComplexity"
     show_text="false"
-    top_delta="36"
+    top_delta="40"
     width="300">
     <slider.commit_callback
       function="Pref.UpdateIndirectMaxComplexity"
diff --git a/indra/newview/skins/default/xui/en/panel_presets_pulldown.xml b/indra/newview/skins/default/xui/en/panel_presets_pulldown.xml
index b87dda2315..b3d165c4fd 100644
--- a/indra/newview/skins/default/xui/en/panel_presets_pulldown.xml
+++ b/indra/newview/skins/default/xui/en/panel_presets_pulldown.xml
@@ -8,7 +8,7 @@
  border="false"
  chrome="true"
  follows="bottom"
- height="155"
+ height="185"
  layout="topleft"
  name="presets_pulldown"
  width="225">
@@ -57,7 +57,7 @@
     width="215" />
   <button
     name="open_prefs_btn"
-    label="Open Graphics Preferences"
+    label="Graphics Preferences"
     tool_tip = "Bring up graphics prefs"
     top_delta="5"
     left="15"
@@ -66,4 +66,15 @@
     <button.commit_callback
       function="Presets.GoGraphicsPrefs" />
   </button>
+  <button
+    name="open_autofps_btn"
+    label="Auto-FPS settings"
+    tool_tip = "Bring up auto-adjust settings"
+    top_pad="5"
+    left="15"
+    height="20"
+    width="200">
+    <button.commit_callback
+     function="Presets.GoAutofpsPrefs" />
+  </button>
 </panel>
diff --git a/indra/newview/skins/default/xui/en/strings.xml b/indra/newview/skins/default/xui/en/strings.xml
index 62b26da552..9c634b661a 100644
--- a/indra/newview/skins/default/xui/en/strings.xml
+++ b/indra/newview/skins/default/xui/en/strings.xml
@@ -4163,6 +4163,7 @@ name="Command_360_Capture_Label">360 snapshot</string>
   <string name="Command_MiniMap_Label">Mini-map</string>
   <string name="Command_Move_Label">Walk / run / fly</string>
   <string name="Command_People_Label">People</string>
+  <string name="Command_Performance_Label">Graphics speed</string>
   <string name="Command_Picks_Label">Picks</string>
   <string name="Command_Places_Label">Places</string>
   <string name="Command_Preferences_Label">Preferences</string>
@@ -4195,6 +4196,7 @@ name="Command_360_Capture_Tooltip">Capture a 360 equirectangular image</string>
   <string name="Command_MiniMap_Tooltip">Show nearby people</string>
   <string name="Command_Move_Tooltip">Moving your avatar</string>
   <string name="Command_People_Tooltip">Friends, groups, and nearby people</string>
+  <string name="Command_Performance_Tooltip">Improve graphics speed</string>
   <string name="Command_Picks_Tooltip">Places to show as favorites in your profile</string>
   <string name="Command_Places_Tooltip">Places you've saved</string>
   <string name="Command_Preferences_Tooltip">Preferences</string>
@@ -4296,7 +4298,7 @@ name="Command_360_Capture_Tooltip">Capture a 360 equirectangular image</string>
   <string name="preset_combo_label">-Empty list-</string>
   <string name="Default">Default</string>
   <string name="none_paren_cap">(None)</string>
-  <string name="no_limit">No Limit</string>
+  <string name="no_limit">No limit</string>
   
   <string name="Mav_Details_MAV_FOUND_DEGENERATE_TRIANGLES">
       The physics shape contains triangles which are too small. Try simplifying the physics model.