1The Snappy compression format in the Go programming language. 2 3To download and install from source: 4$ go get github.com/golang/snappy 5 6Unless otherwise noted, the Snappy-Go source files are distributed 7under the BSD-style license found in the LICENSE file. 8 9 10 11Benchmarks. 12 13The golang/snappy benchmarks include compressing (Z) and decompressing (U) ten 14or so files, the same set used by the C++ Snappy code (github.com/google/snappy 15and note the "google", not "golang"). On an "Intel(R) Core(TM) i7-3770 CPU @ 163.40GHz", Go's GOARCH=amd64 numbers as of 2016-05-29: 17 18"go test -test.bench=." 19 20_UFlat0-8 2.19GB/s ± 0% html 21_UFlat1-8 1.41GB/s ± 0% urls 22_UFlat2-8 23.5GB/s ± 2% jpg 23_UFlat3-8 1.91GB/s ± 0% jpg_200 24_UFlat4-8 14.0GB/s ± 1% pdf 25_UFlat5-8 1.97GB/s ± 0% html4 26_UFlat6-8 814MB/s ± 0% txt1 27_UFlat7-8 785MB/s ± 0% txt2 28_UFlat8-8 857MB/s ± 0% txt3 29_UFlat9-8 719MB/s ± 1% txt4 30_UFlat10-8 2.84GB/s ± 0% pb 31_UFlat11-8 1.05GB/s ± 0% gaviota 32 33_ZFlat0-8 1.04GB/s ± 0% html 34_ZFlat1-8 534MB/s ± 0% urls 35_ZFlat2-8 15.7GB/s ± 1% jpg 36_ZFlat3-8 740MB/s ± 3% jpg_200 37_ZFlat4-8 9.20GB/s ± 1% pdf 38_ZFlat5-8 991MB/s ± 0% html4 39_ZFlat6-8 379MB/s ± 0% txt1 40_ZFlat7-8 352MB/s ± 0% txt2 41_ZFlat8-8 396MB/s ± 1% txt3 42_ZFlat9-8 327MB/s ± 1% txt4 43_ZFlat10-8 1.33GB/s ± 1% pb 44_ZFlat11-8 605MB/s ± 1% gaviota 45 46 47 48"go test -test.bench=. -tags=noasm" 49 50_UFlat0-8 621MB/s ± 2% html 51_UFlat1-8 494MB/s ± 1% urls 52_UFlat2-8 23.2GB/s ± 1% jpg 53_UFlat3-8 1.12GB/s ± 1% jpg_200 54_UFlat4-8 4.35GB/s ± 1% pdf 55_UFlat5-8 609MB/s ± 0% html4 56_UFlat6-8 296MB/s ± 0% txt1 57_UFlat7-8 288MB/s ± 0% txt2 58_UFlat8-8 309MB/s ± 1% txt3 59_UFlat9-8 280MB/s ± 1% txt4 60_UFlat10-8 753MB/s ± 0% pb 61_UFlat11-8 400MB/s ± 0% gaviota 62 63_ZFlat0-8 409MB/s ± 1% html 64_ZFlat1-8 250MB/s ± 1% urls 65_ZFlat2-8 12.3GB/s ± 1% jpg 66_ZFlat3-8 132MB/s ± 0% jpg_200 67_ZFlat4-8 2.92GB/s ± 0% pdf 68_ZFlat5-8 405MB/s ± 1% html4 69_ZFlat6-8 179MB/s ± 1% txt1 70_ZFlat7-8 170MB/s ± 1% txt2 71_ZFlat8-8 189MB/s ± 1% txt3 72_ZFlat9-8 164MB/s ± 1% txt4 73_ZFlat10-8 479MB/s ± 1% pb 74_ZFlat11-8 270MB/s ± 1% gaviota 75 76 77 78For comparison (Go's encoded output is byte-for-byte identical to C++'s), here 79are the numbers from C++ Snappy's 80 81make CXXFLAGS="-O2 -DNDEBUG -g" clean snappy_unittest.log && cat snappy_unittest.log 82 83BM_UFlat/0 2.4GB/s html 84BM_UFlat/1 1.4GB/s urls 85BM_UFlat/2 21.8GB/s jpg 86BM_UFlat/3 1.5GB/s jpg_200 87BM_UFlat/4 13.3GB/s pdf 88BM_UFlat/5 2.1GB/s html4 89BM_UFlat/6 1.0GB/s txt1 90BM_UFlat/7 959.4MB/s txt2 91BM_UFlat/8 1.0GB/s txt3 92BM_UFlat/9 864.5MB/s txt4 93BM_UFlat/10 2.9GB/s pb 94BM_UFlat/11 1.2GB/s gaviota 95 96BM_ZFlat/0 944.3MB/s html (22.31 %) 97BM_ZFlat/1 501.6MB/s urls (47.78 %) 98BM_ZFlat/2 14.3GB/s jpg (99.95 %) 99BM_ZFlat/3 538.3MB/s jpg_200 (73.00 %) 100BM_ZFlat/4 8.3GB/s pdf (83.30 %) 101BM_ZFlat/5 903.5MB/s html4 (22.52 %) 102BM_ZFlat/6 336.0MB/s txt1 (57.88 %) 103BM_ZFlat/7 312.3MB/s txt2 (61.91 %) 104BM_ZFlat/8 353.1MB/s txt3 (54.99 %) 105BM_ZFlat/9 289.9MB/s txt4 (66.26 %) 106BM_ZFlat/10 1.2GB/s pb (19.68 %) 107BM_ZFlat/11 527.4MB/s gaviota (37.72 %) 108