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author | 2018-10-10 12:31:37 -0700 | |
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committer | 2018-10-10 15:35:19 -0400 | |
commit | f340f773edab951656b19b6f1a77c964a78ec4c2 (patch) | |
tree | c42bf7faf49fb2355661c9f39c40513bc1ff2697 /absl/hash/internal/city.h | |
parent | 445998d7ac4e5d3c50411d377e3b50e960d2d6c2 (diff) |
Export of internal Abseil changes.
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906c47420646d510edd2479d5542c56f5fa31b65 by CJ Johnson <johnsoncj@google.com>:
Import of CCTZ from GitHub.
PiperOrigin-RevId: 216573923
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74560d4afd2b605909e677c6fc3076049fb3010a by Eric Fiselier <ericwf@google.com>:
Avoid -Wformat-pedantic in benchmark.
PiperOrigin-RevId: 216523769
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9bcc9da8b03e6d1ea43ee78931256c5541cb9686 by Eric Fiselier <ericwf@google.com>:
Delete unused CityHash functions.
PiperOrigin-RevId: 216464492
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a42563b394c89fbb4c55cb5a6a5edbf96d271eea by Abseil Team <absl-team@google.com>:
Introduce new Abseil interfaces for converting between civil
times and absolute times.s
Deprecates absl::ConvertDateTime() and absl::FromDateTime().
PiperOrigin-RevId: 216424948
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088e11235124267517d7f137854fa5554679c24f by Eric Fiselier <ericwf@google.com>:
Remove unneeded break statements in test.
PiperOrigin-RevId: 216403321
GitOrigin-RevId: 906c47420646d510edd2479d5542c56f5fa31b65
Change-Id: Idb44420be623e369c66f5a9c92bdc9ab46d3ec92
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 55b37b87..16df5563 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); |