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https://github.com/cespare/xxhash
A Go implementation of the 64-bit xxHash algorithm (XXH64)
https://github.com/cespare/xxhash
Last synced: 11 days ago
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A Go implementation of the 64-bit xxHash algorithm (XXH64)
- Host: GitHub
- URL: https://github.com/cespare/xxhash
- Owner: cespare
- License: mit
- Created: 2016-08-27T22:08:31.000Z (almost 8 years ago)
- Default Branch: main
- Last Pushed: 2024-05-08T15:12:15.000Z (about 1 month ago)
- Last Synced: 2024-05-09T12:57:25.215Z (about 1 month ago)
- Language: Go
- Homepage:
- Size: 94.7 KB
- Stars: 1,696
- Watchers: 30
- Forks: 116
- Open Issues: 8
-
Metadata Files:
- Readme: README.md
- License: LICENSE.txt
Lists
- go-awesome - xxhash - xxHash 哈希算法实现 (开源类库 / 算法)
- awesome-ccamel - cespare/xxhash - A Go implementation of the 64-bit xxHash algorithm (XXH64) (Go)
- go_awesome - xxhash - xxHash是一种速度极快的非加密哈希算法，在RAM速度限制下工作。该库是go语言实现的xxHash算法，比标准库性能更高 官网：https://xxhash.com/ (Awesome)
- my-awesome-golang - xxHash
- go-awesome - xxhash - implementation of the xxHash hash algorithm (Open source library / Algorithm)
- my-awesome - cespare/xxhash - 05 star:1.7k fork:0.1k A Go implementation of the 64-bit xxHash algorithm (XXH64) (Go)
- go-awesome - xxhash - xxHash 哈希算法实现 (开源类库 / 算法)
- awesome-stars - cespare/xxhash - A Go implementation of the 64-bit xxHash algorithm (XXH64) (Go)
- zero - xxhash - bit xxHash algorithm (XXH64) | Go | MIT | (Members)
README
# xxhash
[](https://pkg.go.dev/github.com/cespare/xxhash/v2)
[](https://github.com/cespare/xxhash/actions/workflows/test.yml)
xxhash is a Go implementation of the 64-bit [xxHash] algorithm, XXH64. This is a
high-quality hashing algorithm that is much faster than anything in the Go
standard library.
This package provides a straightforward API:
```
func Sum64(b []byte) uint64
func Sum64String(s string) uint64
type Digest struct{ ... }
func New() *Digest
```
The `Digest` type implements hash.Hash64. Its key methods are:
```
func (*Digest) Write([]byte) (int, error)
func (*Digest) WriteString(string) (int, error)
func (*Digest) Sum64() uint64
```
The package is written with optimized pure Go and also contains even faster
assembly implementations for amd64 and arm64. If desired, the `purego` build tag
opts into using the Go code even on those architectures.
[xxHash]: http://cyan4973.github.io/xxHash/
## Compatibility
This package is in a module and the latest code is in version 2 of the module.
You need a version of Go with at least "minimal module compatibility" to use
github.com/cespare/xxhash/v2:
* 1.9.7+ for Go 1.9
* 1.10.3+ for Go 1.10
* Go 1.11 or later
I recommend using the latest release of Go.
## Benchmarks
Here are some quick benchmarks comparing the pure-Go and assembly
implementations of Sum64.
| input size | purego | asm |
| ---------- | --------- | --------- |
| 4 B | 1.3 GB/s | 1.2 GB/s |
| 16 B | 2.9 GB/s | 3.5 GB/s |
| 100 B | 6.9 GB/s | 8.1 GB/s |
| 4 KB | 11.7 GB/s | 16.7 GB/s |
| 10 MB | 12.0 GB/s | 17.3 GB/s |
These numbers were generated on Ubuntu 20.04 with an Intel Xeon Platinum 8252C
CPU using the following commands under Go 1.19.2:
```
benchstat <(go test -tags purego -benchtime 500ms -count 15 -bench 'Sum64$')
benchstat <(go test -benchtime 500ms -count 15 -bench 'Sum64$')
```
## Projects using this package
- [InfluxDB](https://github.com/influxdata/influxdb)
- [Prometheus](https://github.com/prometheus/prometheus)
- [VictoriaMetrics](https://github.com/VictoriaMetrics/VictoriaMetrics)
- [FreeCache](https://github.com/coocood/freecache)
- [FastCache](https://github.com/VictoriaMetrics/fastcache)
- [Ristretto](https://github.com/dgraph-io/ristretto)
- [Badger](https://github.com/dgraph-io/badger)