Merge pull request #1 from wangtuanjie/master benchmark compare to std
CRC32 hash with x64 optimizations
This package is a drop-in replacement for the standard library hash/crc32 package, that features SSE 4.2 optimizations on x64 platforms, for a 10x speedup.
Install using go get github.com/klauspost/crc32. This library is based on Go 1.4.2 code and requires Go 1.3 or newer.
Replace import "hash/crc32" with import "github.com/klauspost/crc32" and you are good to go.
For IEEE tables (the most common), there is approximately a factor 10 speedup with SSE 4.2:
benchmark old ns/op new ns/op delta BenchmarkCrc32KB 99955 10258 -89.74% benchmark old MB/s new MB/s speedup BenchmarkCrc32KB 327.83 3194.20 9.74x
For other tables and non-SSE 4.2 the peformance is the same as the standard library.
Standard Go license. Changes are Copyright (c) 2015 Klaus Post under same conditions.