github
/
prometheus
mirror of https://github.com/prometheus/prometheus
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
Branches Tags
${ item.name }
Create tag ${ searchTerm }
Create branch ${ searchTerm }
from '9fe8bcf4be'
${ noResults }
prometheus/vendor/github.com/cespare/xxhash
History
Fabian Reinartz cb84d6057e
vendor: add non-amd64 implementation for xxhash 		8 years ago
..
LICENSE.txt
…
README.md
…
xxhash.go
…
xxhash_amd64.go
…
xxhash_amd64.s
…
xxhash_other.go vendor: add non-amd64 implementation for xxhash 8 years ago

README.md

xxhash

GoDoc

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.

The API is very small, taking its cue from the other hashing packages in the standard library:

$ go doc github.com/cespare/xxhash                                                                                                                                                                                              !
package xxhash // import "github.com/cespare/xxhash"

Package xxhash implements the 64-bit variant of xxHash (XXH64) as described
at http://cyan4973.github.io/xxHash/.

func New() hash.Hash64
func Sum64(b []byte) uint64

This implementation provides a fast pure-Go implementation and an even faster assembly implementation for amd64.

Here are some quick benchmarks comparing the pure-Go and assembly implementations of Sum64 against another popular Go XXH64 implementation, github.com/OneOfOne/xxhash:

input size OneOfOne cespare (noasm) cespare
5 B 438.34 MB/s 596.40 MB/s 711.11 MB/s
100 B 3676.54 MB/s 4301.40 MB/s 4598.95 MB/s
4 KB 8128.64 MB/s 8840.83 MB/s 10549.72 MB/s
10 MB 7335.19 MB/s 7736.64 MB/s 9024.04 MB/s