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| author | Henri Beauchamp <sldevel@users.noreply.github.com> | 2023-02-07 13:51:53 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2023-02-07 14:51:53 +0200 |
| commit | 1eb2b23f4b254052924b198d446c052df9ca3124 (patch) | |
| tree | 0693ffa2dd5bbc83f798cef02bc01d273c943fc3 /indra/llcommon/lluuid.cpp | |
| parent | 61b93e778bf58f6db4d2f3d8dd6ec67de25598ea (diff) | |
SL-19159 Faster LLUUID and LLMaterialID hashing for std and boost containers keys (#70)
LLUUID and LLMaterialID already have an excellent entropy and value dispersion; there is therefore strictly no need to further (slowly) hash their value for use with std and boost libraries containers.
This commit adds a trivial getDigest64() method to both LLUUID and LLMaterialID (which simply returns the XOR of the two 64 bits long words their value is made of), and uses it in std::hash and hash_value() specializations for use with containers.
Diffstat (limited to 'indra/llcommon/lluuid.cpp')
| -rw-r--r-- | indra/llcommon/lluuid.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/indra/llcommon/lluuid.cpp b/indra/llcommon/lluuid.cpp index 8ff6c45760..aa8045e6ab 100644 --- a/indra/llcommon/lluuid.cpp +++ b/indra/llcommon/lluuid.cpp @@ -878,7 +878,7 @@ U32 LLUUID::getRandomSeed() seed[7]=(unsigned char)(pid); getSystemTime((uuid_time_t *)(&seed[8])); - U64 seed64 = HBXXH64((const void*)seed, 16).digest(); + U64 seed64 = HBXXH64::digest((const void*)seed, 16); return U32(seed64) ^ U32(seed64 >> 32); } |