diff options
Diffstat (limited to 'lib/xxhash.h')
| -rw-r--r-- | lib/xxhash.h | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/lib/xxhash.h b/lib/xxhash.h index 99b0c27..34eea73 100644 --- a/lib/xxhash.h +++ b/lib/xxhash.h @@ -56,6 +56,12 @@ SHA1-32 0.28 GB/s 10 Q.Score is a measure of quality of the hash function. It depends on successfully passing SMHasher test set. 10 is a perfect score. + +A new 64-bits version, named XXH64, is available since r35. +It offers better speed for 64-bits applications. +Name Speed on 64 bits Speed on 32 bits +XXH64 13.8 GB/s 1.9 GB/s +XXH32 6.8 GB/s 6.0 GB/s */ #pragma once @@ -66,20 +72,15 @@ extern "C" { /***************************** - Includes +* Definitions *****************************/ #include <stddef.h> /* size_t */ - - -/***************************** - Type -*****************************/ typedef enum { XXH_OK=0, XXH_ERROR } XXH_errorcode; /***************************** - Simple Hash Functions +* Simple Hash Functions *****************************/ unsigned int XXH32 (const void* input, size_t length, unsigned seed); @@ -94,12 +95,13 @@ XXH32() : Speed on Core 2 Duo @ 3 GHz (single thread, SMHasher benchmark) : 5.4 GB/s XXH64() : Calculate the 64-bits hash of sequence of length "len" stored at memory address "input". + Faster on 64-bits systems. Slower on 32-bits systems. */ /***************************** - Advanced Hash Functions +* Advanced Hash Functions *****************************/ typedef struct { long long ll[ 6]; } XXH32_state_t; typedef struct { long long ll[11]; } XXH64_state_t; |