mirror of
https://github.com/prometheus-community/postgres_exporter
synced 2025-04-28 22:18:05 +00:00
989489096e
This commit implements a massive refactor of the repository, and moves the build system over to use Mage (magefile.org) which should allow seamless building across multiple platforms.
108 lines
3.5 KiB
Plaintext
108 lines
3.5 KiB
Plaintext
The Snappy compression format in the Go programming language.
|
|
|
|
To download and install from source:
|
|
$ go get github.com/golang/snappy
|
|
|
|
Unless otherwise noted, the Snappy-Go source files are distributed
|
|
under the BSD-style license found in the LICENSE file.
|
|
|
|
|
|
|
|
Benchmarks.
|
|
|
|
The golang/snappy benchmarks include compressing (Z) and decompressing (U) ten
|
|
or so files, the same set used by the C++ Snappy code (github.com/google/snappy
|
|
and note the "google", not "golang"). On an "Intel(R) Core(TM) i7-3770 CPU @
|
|
3.40GHz", Go's GOARCH=amd64 numbers as of 2016-05-29:
|
|
|
|
"go test -test.bench=."
|
|
|
|
_UFlat0-8 2.19GB/s ± 0% html
|
|
_UFlat1-8 1.41GB/s ± 0% urls
|
|
_UFlat2-8 23.5GB/s ± 2% jpg
|
|
_UFlat3-8 1.91GB/s ± 0% jpg_200
|
|
_UFlat4-8 14.0GB/s ± 1% pdf
|
|
_UFlat5-8 1.97GB/s ± 0% html4
|
|
_UFlat6-8 814MB/s ± 0% txt1
|
|
_UFlat7-8 785MB/s ± 0% txt2
|
|
_UFlat8-8 857MB/s ± 0% txt3
|
|
_UFlat9-8 719MB/s ± 1% txt4
|
|
_UFlat10-8 2.84GB/s ± 0% pb
|
|
_UFlat11-8 1.05GB/s ± 0% gaviota
|
|
|
|
_ZFlat0-8 1.04GB/s ± 0% html
|
|
_ZFlat1-8 534MB/s ± 0% urls
|
|
_ZFlat2-8 15.7GB/s ± 1% jpg
|
|
_ZFlat3-8 740MB/s ± 3% jpg_200
|
|
_ZFlat4-8 9.20GB/s ± 1% pdf
|
|
_ZFlat5-8 991MB/s ± 0% html4
|
|
_ZFlat6-8 379MB/s ± 0% txt1
|
|
_ZFlat7-8 352MB/s ± 0% txt2
|
|
_ZFlat8-8 396MB/s ± 1% txt3
|
|
_ZFlat9-8 327MB/s ± 1% txt4
|
|
_ZFlat10-8 1.33GB/s ± 1% pb
|
|
_ZFlat11-8 605MB/s ± 1% gaviota
|
|
|
|
|
|
|
|
"go test -test.bench=. -tags=noasm"
|
|
|
|
_UFlat0-8 621MB/s ± 2% html
|
|
_UFlat1-8 494MB/s ± 1% urls
|
|
_UFlat2-8 23.2GB/s ± 1% jpg
|
|
_UFlat3-8 1.12GB/s ± 1% jpg_200
|
|
_UFlat4-8 4.35GB/s ± 1% pdf
|
|
_UFlat5-8 609MB/s ± 0% html4
|
|
_UFlat6-8 296MB/s ± 0% txt1
|
|
_UFlat7-8 288MB/s ± 0% txt2
|
|
_UFlat8-8 309MB/s ± 1% txt3
|
|
_UFlat9-8 280MB/s ± 1% txt4
|
|
_UFlat10-8 753MB/s ± 0% pb
|
|
_UFlat11-8 400MB/s ± 0% gaviota
|
|
|
|
_ZFlat0-8 409MB/s ± 1% html
|
|
_ZFlat1-8 250MB/s ± 1% urls
|
|
_ZFlat2-8 12.3GB/s ± 1% jpg
|
|
_ZFlat3-8 132MB/s ± 0% jpg_200
|
|
_ZFlat4-8 2.92GB/s ± 0% pdf
|
|
_ZFlat5-8 405MB/s ± 1% html4
|
|
_ZFlat6-8 179MB/s ± 1% txt1
|
|
_ZFlat7-8 170MB/s ± 1% txt2
|
|
_ZFlat8-8 189MB/s ± 1% txt3
|
|
_ZFlat9-8 164MB/s ± 1% txt4
|
|
_ZFlat10-8 479MB/s ± 1% pb
|
|
_ZFlat11-8 270MB/s ± 1% gaviota
|
|
|
|
|
|
|
|
For comparison (Go's encoded output is byte-for-byte identical to C++'s), here
|
|
are the numbers from C++ Snappy's
|
|
|
|
make CXXFLAGS="-O2 -DNDEBUG -g" clean snappy_unittest.log && cat snappy_unittest.log
|
|
|
|
BM_UFlat/0 2.4GB/s html
|
|
BM_UFlat/1 1.4GB/s urls
|
|
BM_UFlat/2 21.8GB/s jpg
|
|
BM_UFlat/3 1.5GB/s jpg_200
|
|
BM_UFlat/4 13.3GB/s pdf
|
|
BM_UFlat/5 2.1GB/s html4
|
|
BM_UFlat/6 1.0GB/s txt1
|
|
BM_UFlat/7 959.4MB/s txt2
|
|
BM_UFlat/8 1.0GB/s txt3
|
|
BM_UFlat/9 864.5MB/s txt4
|
|
BM_UFlat/10 2.9GB/s pb
|
|
BM_UFlat/11 1.2GB/s gaviota
|
|
|
|
BM_ZFlat/0 944.3MB/s html (22.31 %)
|
|
BM_ZFlat/1 501.6MB/s urls (47.78 %)
|
|
BM_ZFlat/2 14.3GB/s jpg (99.95 %)
|
|
BM_ZFlat/3 538.3MB/s jpg_200 (73.00 %)
|
|
BM_ZFlat/4 8.3GB/s pdf (83.30 %)
|
|
BM_ZFlat/5 903.5MB/s html4 (22.52 %)
|
|
BM_ZFlat/6 336.0MB/s txt1 (57.88 %)
|
|
BM_ZFlat/7 312.3MB/s txt2 (61.91 %)
|
|
BM_ZFlat/8 353.1MB/s txt3 (54.99 %)
|
|
BM_ZFlat/9 289.9MB/s txt4 (66.26 %)
|
|
BM_ZFlat/10 1.2GB/s pb (19.68 %)
|
|
BM_ZFlat/11 527.4MB/s gaviota (37.72 %)
|