SL-19110 Fast hashing classes for use in place of the slow LLMD5, where speed matters. (#64)

This commit adds the HBXX64 and HBXX128 classes for use as a drop-in
replacement for the slow LLMD5 hashing class, where speed matters and
backward compatibility (with standard hashing algorithms) and/or
cryptographic hashing qualities are not required.
It also replaces LLMD5 with HBXX* in a few existing hot (well, ok, just
"warm" for some) paths meeting the above requirements, while paving the way for
future use cases, such as in the DRTVWR-559 and sibling branches where the slow
LLMD5 is used (e.g. to hash materials and vertex buffer cache entries), and
could be use such a (way) faster algorithm with very significant benefits and
no negative impact.

Here is the comment I added in indra/llcommon/hbxx.h:

// HBXXH* classes are to be used where speed matters and cryptographic quality
// is not required (no "one-way" guarantee, though they are likely not worst in
// this respect than MD5 which got busted and is now considered too weak). The
// xxHash code they are built upon is vectorized and about 50 times faster than
// MD5. A 64 bits hash class is also provided for when 128 bits of entropy are
// not needed. The hashes collision rate is similar to MD5's.
// See https://github.com/Cyan4973/xxHash#readme for details.

11 files changed, 11 insertions, 0 deletions

diff --git a/indra/newview/skins/default/xui/da/floater_about.xml b/indra/newview/skins/default/xui/da/floater_about.xml
index b322e67bb7..7bcae69779 100644
--- a/indra/newview/skins/default/xui/da/floater_about.xml
+++ b/indra/newview/skins/default/xui/da/floater_about.xml
@@ -70,6 +70,7 @@ PCRE Copyright (c) 1997-2008 University of Cambridge
 SDL Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
 SSLeay Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 xmlrpc-epi Copyright (C) 2000 Epinions, Inc.
+xxHash Copyright (C) 2012-2020 Yann Collet.
 zlib Copyright (C) 1995-2002 Jean-loup Gailly and Mark Adler.
 google-perftools Copyright (c) 2005, Google Inc.
 
diff --git a/indra/newview/skins/default/xui/de/floater_about.xml b/indra/newview/skins/default/xui/de/floater_about.xml
index b2708f7141..10ccf0d5da 100644
--- a/indra/newview/skins/default/xui/de/floater_about.xml
+++ b/indra/newview/skins/default/xui/de/floater_about.xml
@@ -29,6 +29,7 @@ mit Open-Source-Beiträgen von:</text>
         SDL Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga.
         SSLeay Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com).
         xmlrpc-epi Copyright (C) 2000 Epinions, Inc.
+        xxHash Copyright (C) 2012-2020 Yann Collet.
         zlib Copyright (C) 1995-2012 Jean-loup Gailly und Mark Adler.
 
         Second Life Viewer verwendet Havok (TM) Physics. (c)Copyright 1999-2010 Havok.com Inc. (und Lizenzgeber). Alle Rechte vorbehalten. Details siehe www.havok.com.
diff --git a/indra/newview/skins/default/xui/en/floater_about.xml b/indra/newview/skins/default/xui/en/floater_about.xml
index eb07425dfe..1ad7811d85 100644
--- a/indra/newview/skins/default/xui/en/floater_about.xml
+++ b/indra/newview/skins/default/xui/en/floater_about.xml
@@ -112,6 +112,7 @@ Dummy Name replaced at run time
         SDL Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
         SSLeay Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
         xmlrpc-epi Copyright (C) 2000 Epinions, Inc.
+        xxHash Copyright (C) 2012-2020 Yann Collet.
         zlib Copyright (C) 1995-2012 Jean-loup Gailly and Mark Adler.
 
         Second Life Viewer uses Havok (TM) Physics. (c)Copyright 1999-2010 Havok.com Inc. (and its Licensors). All Rights Reserved. See www.havok.com for details.
diff --git a/indra/newview/skins/default/xui/es/floater_about.xml b/indra/newview/skins/default/xui/es/floater_about.xml
index f59f534908..e14ba32f69 100644
--- a/indra/newview/skins/default/xui/es/floater_about.xml
+++ b/indra/newview/skins/default/xui/es/floater_about.xml
@@ -29,6 +29,7 @@ con contribuciones de código abierto de:</text>
         SDL Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
         SSLeay Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
         xmlrpc-epi Copyright (C) 2000 Epinions, Inc.
+        xxHash Copyright (C) 2012-2020 Yann Collet.
         zlib Copyright (C) 1995-2012 Jean-loup Gailly y Mark Adler.
 
         El visor de Second Life usa Havok (TM) Physics. (c)Copyright 1999-2010 Havok.com Inc. (y sus licenciadores). Reservados todos los derechos. Vea los detalles en www.havok.com.
diff --git a/indra/newview/skins/default/xui/fr/floater_about.xml b/indra/newview/skins/default/xui/fr/floater_about.xml
index df6b61e293..09da1fb5fd 100644
--- a/indra/newview/skins/default/xui/fr/floater_about.xml
+++ b/indra/newview/skins/default/xui/fr/floater_about.xml
@@ -29,6 +29,7 @@ avec les contributions Open Source de :</text>
         SDL Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
         SSLeay Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
         xmlrpc-epi Copyright (C) 2000 Epinions, Inc.
+        xxHash Copyright (C) 2012-2020 Yann Collet.
         zlib Copyright (C) 1995-2012 Jean-Loup Gailly et Mark Adler.
 
         Le client Second Life utilise Havok (TM) Physics. (c)Copyright 1999-2010 Havok.com Inc. (et ses concédants de licence). Tous droits réservés. Pour plus de détails, consultez le site Web www.havok.com.
diff --git a/indra/newview/skins/default/xui/it/floater_about.xml b/indra/newview/skins/default/xui/it/floater_about.xml
index edb334e13e..7e195d3ca9 100644
--- a/indra/newview/skins/default/xui/it/floater_about.xml
+++ b/indra/newview/skins/default/xui/it/floater_about.xml
@@ -29,6 +29,7 @@ con contributi open source da:</text>
         SDL Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
         SSLeay Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
         xmlrpc-epi Copyright (C) 2000 Epinions, Inc.
+        xxHash Copyright (C) 2012-2020 Yann Collet.
         zlib Copyright (C) 1995-2012 Jean-loup Gailly e Mark Adler.
 
         Il Viewer Second Life utilizza Havok (TM) Physics. (c)Copyright 1999-2010 Havok.com Inc. (e licenziatari). Tutti i diritti riservati. Per informazioni dettagliate, vedere www.havok.com.
diff --git a/indra/newview/skins/default/xui/ja/floater_about.xml b/indra/newview/skins/default/xui/ja/floater_about.xml
index 6a39d057e2..22a65003d3 100644
--- a/indra/newview/skins/default/xui/ja/floater_about.xml
+++ b/indra/newview/skins/default/xui/ja/floater_about.xml
@@ -29,6 +29,7 @@ PCRE Copyright (c) 1997-2012 University of Cambridge
 SDL Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
 SSLeay Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 xmlrpc-epi Copyright (C) 2000 Epinions, Inc.
+xxHash Copyright (C) 2012-2020 Yann Collet.
 zlib Copyright (C) 1995-2012 Jean-loup Gailly and Mark Adler.
 
 Second Life ビューワでは Havok (TM) Physics が使用されています。(c)Copyright 1999-2010 Havok.com Inc. (and its Licensors).無断複写・複製・転載を禁じます。詳細については www.havok.com をご参照ください。
diff --git a/indra/newview/skins/default/xui/pt/floater_about.xml b/indra/newview/skins/default/xui/pt/floater_about.xml
index 3c0ca332ac..aaed728f84 100644
--- a/indra/newview/skins/default/xui/pt/floater_about.xml
+++ b/indra/newview/skins/default/xui/pt/floater_about.xml
@@ -29,6 +29,7 @@ com contribuições de código aberto de:</text>
         SDL Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
         SSLeay Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
         xmlrpc-epi Copyright (C) 2000 Epinions, Inc.
+        xxHash Copyright (C) 2012-2020 Yann Collet.
         zlib Copyright (C) 1995-2012 Jean-loup Gailly and Mark Adler.
 
         O Visualizador do Second Life usa Havok (TM) Physics. (c)Copyright 1999-2010 Havok.com Inc. (e seus Licenciantes). Todos os direitos reservados. Consulte www.havok.com para obter detalhes.
diff --git a/indra/newview/skins/default/xui/ru/floater_about.xml b/indra/newview/skins/default/xui/ru/floater_about.xml
index 44216e0430..a65a979ccd 100644
--- a/indra/newview/skins/default/xui/ru/floater_about.xml
+++ b/indra/newview/skins/default/xui/ru/floater_about.xml
@@ -29,6 +29,7 @@
         SDL (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
         SSLeay (C) 1995-1998 Eric Young (eay@cryptsoft.com)
         xmlrpc-epi (C) 2000 Epinions, Inc.
+        xxHash Copyright (C) 2012-2020 Yann Collet.
         zlib (C) 1995-2012 Jean-loup Gailly и Mark Adler.
 
         В клиенте Second Life используется технология Havok (TM) Physics. (C) 1999-2010 Havok.com Inc. (и лицензиары компании). Все права защищены. Подробнее см. веб-сайт www.havok.com.
diff --git a/indra/newview/skins/default/xui/tr/floater_about.xml b/indra/newview/skins/default/xui/tr/floater_about.xml
index faa504a996..40ca3707c3 100644
--- a/indra/newview/skins/default/xui/tr/floater_about.xml
+++ b/indra/newview/skins/default/xui/tr/floater_about.xml
@@ -29,6 +29,7 @@ açık kaynak kod katkısında bulunanlar şunlardır:</text>
         SDL Telif Hakkı (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
         SSLeay Telif Hakkı (C) 1995-1998 Eric Young (eay@cryptsoft.com)
         xmlrpc-epi Telif Hakkı (C) 2000 Epinions, Inc.
+        xxHash Copyright (C) 2012-2020 Yann Collet.
         zlib Telif Hakkı (C) 1995-2012 Jean-loup Gailly ve Mark Adler.
 
         Second Life Görüntüleyicisi Havok (TM) Fizik motorunu kullanmaktadır. (c)Telif Hakkı 1999-2010 Havok.com Inc. (ve Lisans Verenleri). Tüm Hakları Saklıdır. Ayrıntılı bilgi için bkz. www.havok.com
diff --git a/indra/newview/skins/default/xui/zh/floater_about.xml b/indra/newview/skins/default/xui/zh/floater_about.xml
index d7d2a52750..a56ae753d1 100644
--- a/indra/newview/skins/default/xui/zh/floater_about.xml
+++ b/indra/newview/skins/default/xui/zh/floater_about.xml
@@ -29,6 +29,7 @@
         SDL Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
         SSLeay Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
         xmlrpc-epi Copyright (C) 2000 Epinions, Inc.
+        xxHash Copyright (C) 2012-2020 Yann Collet.
         zlib Copyright (C) 1995-2012 Jean-loup Gailly and Mark Adler.
 
         第二人生 Viewer 採用 Havok (TM) 物理引擎。 (c)Copyright 1999-2010 Havok.com Inc.（及其放照人）。 保留一切權利。 詳情見 www.havok.com。