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xframe/vendor/github.com/go-faster/city/README.md

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city stable

CityHash in Go. Fork of tenfyzhong/cityhash.

Note: prefer xxhash as non-cryptographic hash algorithm, this package is intended for places where CityHash is already used.

CityHash is not compatible to FarmHash, use go-farm.

go get github.com/go-faster/city

city.Hash128([]byte("hello"))
  • Faster
  • Supports ClickHouse hash
name            old time/op    new time/op    delta
CityHash64-32      333ns ± 2%     108ns ± 3%   -67.57%  (p=0.000 n=10+10)
CityHash128-32     347ns ± 2%     112ns ± 2%   -67.74%  (p=0.000 n=9+10)

name            old speed      new speed      delta
CityHash64-32   3.08GB/s ± 2%  9.49GB/s ± 3%  +208.40%  (p=0.000 n=10+10)
CityHash128-32  2.95GB/s ± 2%  9.14GB/s ± 2%  +209.98%  (p=0.000 n=9+10)

Benchmarks

goos: linux
goarch: amd64
pkg: github.com/go-faster/city
cpu: AMD Ryzen 9 5950X 16-Core Processor
BenchmarkClickHouse128/16     2213.98 MB/s
BenchmarkClickHouse128/64     4712.24 MB/s
BenchmarkClickHouse128/256    7561.58 MB/s
BenchmarkClickHouse128/1024  10158.98 MB/s
BenchmarkClickHouse64        10379.89 MB/s
BenchmarkCityHash32           3140.54 MB/s
BenchmarkCityHash64           9508.45 MB/s
BenchmarkCityHash128          9304.27 MB/s
BenchmarkCityHash64Small      2700.84 MB/s
BenchmarkCityHash128Small     1175.65 MB/s