diff options
Diffstat (limited to 'absl/hash/internal/city.h')
| -rw-r--r-- | absl/hash/internal/city.h | 16 |
1 files changed, 0 insertions, 16 deletions
diff --git a/absl/hash/internal/city.h b/absl/hash/internal/city.h index 55b37b875f0b..16df55635481 100644 --- a/absl/hash/internal/city.h +++ b/absl/hash/internal/city.h @@ -23,15 +23,6 @@ // is Murmur3. For 64-bit x86 code, CityHash64 is an excellent choice for hash // tables and most other hashing (excluding cryptography). // -// For 64-bit x86 code, on long strings, the picture is more complicated. -// On many recent Intel CPUs, such as Nehalem, Westmere, Sandy Bridge, etc., -// CityHashCrc128 appears to be faster than all competitors of comparable -// quality. CityHash128 is also good but not quite as fast. We believe our -// nearest competitor is Bob Jenkins' Spooky. We don't have great data for -// other 64-bit CPUs, but for long strings we know that Spooky is slightly -// faster than CityHash on some relatively recent AMD x86-64 CPUs, for example. -// Note that CityHashCrc128 is declared in citycrc.h. -// // For 32-bit x86 code, we don't know of anything faster than CityHash32 that // is of comparable quality. We believe our nearest competitor is Murmur3A. // (On 64-bit CPUs, it is typically faster to use the other CityHash variants.) @@ -79,13 +70,6 @@ uint64_t CityHash64WithSeed(const char *s, size_t len, uint64_t seed); uint64_t CityHash64WithSeeds(const char *s, size_t len, uint64_t seed0, uint64_t seed1); -// Hash function for a byte array. -uint128 CityHash128(const char *s, size_t len); - -// Hash function for a byte array. For convenience, a 128-bit seed is also -// hashed into the result. -uint128 CityHash128WithSeed(const char *s, size_t len, uint128 seed); - // Hash function for a byte array. Most useful in 32-bit binaries. uint32_t CityHash32(const char *s, size_t len); |