diff options
| author | Henri Beauchamp <sldevel@users.noreply.github.com> | 2023-01-31 17:42:51 +0100 |
|---|---|---|
| committer | Andrey Kleshchev <andreykproductengine@lindenlab.com> | 2023-01-31 22:04:14 +0200 |
| commit | 473ade269628d1fb6cbc7b96a91e1c0aec1b8e59 (patch) | |
| tree | 5e3347164dbffdb8c73b9a58c94fff75eb221aac /indra/newview/skins/default/xui/en | |
| parent | c154f4f6da10df693cbe15e0fe291d5b3c423d32 (diff) | |
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.
Diffstat (limited to 'indra/newview/skins/default/xui/en')
| -rw-r--r-- | indra/newview/skins/default/xui/en/floater_about.xml | 1 |
1 files changed, 1 insertions, 0 deletions
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. |