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289b30715d
This commit converts the dependency management from Godeps to the vendor folder, also switching the tool from godep to trash. Since the upstream tool lacks a few features proposed via a few PRs, until those PRs are merged in (if), use github.com/karalabe/trash. You can update dependencies via trash --update. All dependencies have been updated to their latest version. Parts of the build system are reworked to drop old notions of Godeps and invocation of the go vet command so that it doesn't run against the vendor folder, as that will just blow up during vetting. The conversion drops OpenCL (and hence GPU mining support) from ethash and our codebase. The short reasoning is that there's noone to maintain and having opencl libs in our deps messes up builds as go install ./... tries to build them, failing with unsatisfied link errors for the C OpenCL deps. golang.org/x/net/context is not vendored in. We expect it to be fetched by the user (i.e. using go get). To keep ci.go builds reproducible the package is "vendored" in build/_vendor.
108 lines
3.5 KiB
Plaintext
108 lines
3.5 KiB
Plaintext
The Snappy compression format in the Go programming language.
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To download and install from source:
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$ go get github.com/golang/snappy
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Unless otherwise noted, the Snappy-Go source files are distributed
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under the BSD-style license found in the LICENSE file.
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Benchmarks.
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The golang/snappy benchmarks include compressing (Z) and decompressing (U) ten
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or so files, the same set used by the C++ Snappy code (github.com/google/snappy
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and note the "google", not "golang"). On an "Intel(R) Core(TM) i7-3770 CPU @
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3.40GHz", Go's GOARCH=amd64 numbers as of 2016-05-29:
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"go test -test.bench=."
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_UFlat0-8 2.19GB/s ± 0% html
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_UFlat1-8 1.41GB/s ± 0% urls
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_UFlat2-8 23.5GB/s ± 2% jpg
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_UFlat3-8 1.91GB/s ± 0% jpg_200
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_UFlat4-8 14.0GB/s ± 1% pdf
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_UFlat5-8 1.97GB/s ± 0% html4
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_UFlat6-8 814MB/s ± 0% txt1
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_UFlat7-8 785MB/s ± 0% txt2
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_UFlat8-8 857MB/s ± 0% txt3
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_UFlat9-8 719MB/s ± 1% txt4
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_UFlat10-8 2.84GB/s ± 0% pb
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_UFlat11-8 1.05GB/s ± 0% gaviota
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_ZFlat0-8 1.04GB/s ± 0% html
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_ZFlat1-8 534MB/s ± 0% urls
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_ZFlat2-8 15.7GB/s ± 1% jpg
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_ZFlat3-8 740MB/s ± 3% jpg_200
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_ZFlat4-8 9.20GB/s ± 1% pdf
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_ZFlat5-8 991MB/s ± 0% html4
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_ZFlat6-8 379MB/s ± 0% txt1
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_ZFlat7-8 352MB/s ± 0% txt2
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_ZFlat8-8 396MB/s ± 1% txt3
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_ZFlat9-8 327MB/s ± 1% txt4
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_ZFlat10-8 1.33GB/s ± 1% pb
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_ZFlat11-8 605MB/s ± 1% gaviota
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"go test -test.bench=. -tags=noasm"
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_UFlat0-8 621MB/s ± 2% html
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_UFlat1-8 494MB/s ± 1% urls
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_UFlat2-8 23.2GB/s ± 1% jpg
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_UFlat3-8 1.12GB/s ± 1% jpg_200
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_UFlat4-8 4.35GB/s ± 1% pdf
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_UFlat5-8 609MB/s ± 0% html4
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_UFlat6-8 296MB/s ± 0% txt1
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_UFlat7-8 288MB/s ± 0% txt2
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_UFlat8-8 309MB/s ± 1% txt3
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_UFlat9-8 280MB/s ± 1% txt4
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_UFlat10-8 753MB/s ± 0% pb
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_UFlat11-8 400MB/s ± 0% gaviota
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_ZFlat0-8 409MB/s ± 1% html
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_ZFlat1-8 250MB/s ± 1% urls
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_ZFlat2-8 12.3GB/s ± 1% jpg
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_ZFlat3-8 132MB/s ± 0% jpg_200
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_ZFlat4-8 2.92GB/s ± 0% pdf
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_ZFlat5-8 405MB/s ± 1% html4
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_ZFlat6-8 179MB/s ± 1% txt1
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_ZFlat7-8 170MB/s ± 1% txt2
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_ZFlat8-8 189MB/s ± 1% txt3
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_ZFlat9-8 164MB/s ± 1% txt4
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_ZFlat10-8 479MB/s ± 1% pb
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_ZFlat11-8 270MB/s ± 1% gaviota
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For comparison (Go's encoded output is byte-for-byte identical to C++'s), here
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are the numbers from C++ Snappy's
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make CXXFLAGS="-O2 -DNDEBUG -g" clean snappy_unittest.log && cat snappy_unittest.log
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BM_UFlat/0 2.4GB/s html
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BM_UFlat/1 1.4GB/s urls
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BM_UFlat/2 21.8GB/s jpg
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BM_UFlat/3 1.5GB/s jpg_200
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BM_UFlat/4 13.3GB/s pdf
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BM_UFlat/5 2.1GB/s html4
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BM_UFlat/6 1.0GB/s txt1
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BM_UFlat/7 959.4MB/s txt2
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BM_UFlat/8 1.0GB/s txt3
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BM_UFlat/9 864.5MB/s txt4
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BM_UFlat/10 2.9GB/s pb
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BM_UFlat/11 1.2GB/s gaviota
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BM_ZFlat/0 944.3MB/s html (22.31 %)
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BM_ZFlat/1 501.6MB/s urls (47.78 %)
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BM_ZFlat/2 14.3GB/s jpg (99.95 %)
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BM_ZFlat/3 538.3MB/s jpg_200 (73.00 %)
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BM_ZFlat/4 8.3GB/s pdf (83.30 %)
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BM_ZFlat/5 903.5MB/s html4 (22.52 %)
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BM_ZFlat/6 336.0MB/s txt1 (57.88 %)
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BM_ZFlat/7 312.3MB/s txt2 (61.91 %)
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BM_ZFlat/8 353.1MB/s txt3 (54.99 %)
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BM_ZFlat/9 289.9MB/s txt4 (66.26 %)
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BM_ZFlat/10 1.2GB/s pb (19.68 %)
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BM_ZFlat/11 527.4MB/s gaviota (37.72 %)
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