Klaus Post 53984e5be2 compress/flate: optimize huffman bit encoder ... Part 1 of optimizing the deflater. This optimizes the bitwriter by: * Removing allocations. * Storing compound values for bit codes instead of 2 separate tables. * Accumulate 48 bits between writes instead of 24. * Inline bit flushing. This also contains code that will be used in later CL's (writeBlockDynamic, writeBlockHuff). Tests for Huffman bit writer encoding regressions has been added. name old speed new speed delta EncodeDigitsSpeed1e4-4 19.3MB/s ± 1% 21.6MB/s ± 1% +11.77% EncodeDigitsSpeed1e5-4 25.0MB/s ± 6% 30.7MB/s ± 1% +22.70% EncodeDigitsSpeed1e6-4 28.2MB/s ± 1% 32.3MB/s ± 1% +14.64% EncodeDigitsDefault1e4-4 13.3MB/s ± 0% 14.2MB/s ± 1% +7.07% EncodeDigitsDefault1e5-4 6.43MB/s ± 1% 6.64MB/s ± 1% +3.27% EncodeDigitsDefault1e6-4 5.81MB/s ± 0% 5.85MB/s ± 1% +0.69% EncodeDigitsCompress1e4-4 13.2MB/s ± 0% 14.4MB/s ± 0% +9.10% EncodeDigitsCompress1e5-4 6.40MB/s ± 1% 6.61MB/s ± 0% +3.20% EncodeDigitsCompress1e6-4 5.80MB/s ± 1% 5.90MB/s ± 1% +1.64% EncodeTwainSpeed1e4-4 18.4MB/s ± 1% 20.7MB/s ± 1% +12.72% EncodeTwainSpeed1e5-4 27.7MB/s ± 1% 31.0MB/s ± 1% +11.78% EncodeTwainSpeed1e6-4 29.1MB/s ± 0% 32.9MB/s ± 2% +13.25% EncodeTwainDefault1e4-4 12.4MB/s ± 0% 13.1MB/s ± 1% +5.88% EncodeTwainDefault1e5-4 7.52MB/s ± 1% 7.83MB/s ± 0% +4.19% EncodeTwainDefault1e6-4 7.08MB/s ± 1% 7.26MB/s ± 0% +2.54% EncodeTwainCompress1e4-4 12.0MB/s ± 1% 12.8MB/s ± 1% +6.70% EncodeTwainCompress1e5-4 5.96MB/s ± 1% 6.16MB/s ± 0% +3.27% EncodeTwainCompress1e6-4 5.37MB/s ± 0% 5.39MB/s ± 1% +0.47% >Allocations: benchmark old allocs new allocs delta BenchmarkEncodeDigitsSpeed1e4-4 50 0 -100.00% BenchmarkEncodeDigitsSpeed1e5-4 110 0 -100.00% BenchmarkEncodeDigitsSpeed1e6-4 1032 0 -100.00% BenchmarkEncodeDigitsDefault1e4-4 56 0 -100.00% BenchmarkEncodeDigitsDefault1e5-4 120 0 -100.00% BenchmarkEncodeDigitsDefault1e6-4 966 0 -100.00% BenchmarkEncodeDigitsCompress1e4-4 56 0 -100.00% BenchmarkEncodeDigitsCompress1e5-4 120 0 -100.00% BenchmarkEncodeDigitsCompress1e6-4 966 0 -100.00% BenchmarkEncodeTwainSpeed1e4-4 58 0 -100.00% BenchmarkEncodeTwainSpeed1e5-4 132 0 -100.00% BenchmarkEncodeTwainSpeed1e6-4 1082 0 -100.00% BenchmarkEncodeTwainDefault1e4-4 52 0 -100.00% BenchmarkEncodeTwainDefault1e5-4 126 0 -100.00% BenchmarkEncodeTwainDefault1e6-4 886 0 -100.00% BenchmarkEncodeTwainCompress1e4-4 52 0 -100.00% BenchmarkEncodeTwainCompress1e5-4 120 0 -100.00% BenchmarkEncodeTwainCompress1e6-4 880 0 -100.00% benchmark old bytes new bytes delta BenchmarkEncodeDigitsSpeed1e4-4 4288 2 -99.95% BenchmarkEncodeDigitsSpeed1e5-4 8896 15 -99.83% BenchmarkEncodeDigitsSpeed1e6-4 84098 153 -99.82% BenchmarkEncodeDigitsDefault1e4-4 4480 3 -99.93% BenchmarkEncodeDigitsDefault1e5-4 9216 76 -99.18% BenchmarkEncodeDigitsDefault1e6-4 73920 768 -98.96% BenchmarkEncodeDigitsCompress1e4-4 4480 3 -99.93% BenchmarkEncodeDigitsCompress1e5-4 9216 76 -99.18% BenchmarkEncodeDigitsCompress1e6-4 73920 768 -98.96% BenchmarkEncodeTwainSpeed1e4-4 4544 2 -99.96% BenchmarkEncodeTwainSpeed1e5-4 9600 15 -99.84% BenchmarkEncodeTwainSpeed1e6-4 77633 153 -99.80% BenchmarkEncodeTwainDefault1e4-4 4352 3 -99.93% BenchmarkEncodeTwainDefault1e5-4 9408 76 -99.19% BenchmarkEncodeTwainDefault1e6-4 65984 768 -98.84% BenchmarkEncodeTwainCompress1e4-4 4352 3 -99.93% BenchmarkEncodeTwainCompress1e5-4 9216 76 -99.18% BenchmarkEncodeTwainCompress1e6-4 65792 768 -98.83% Updates #14258 Change-Id: Ibaa97b9619743ad623094727228eb2ada1ec7f1f Reviewed-on: https://go-review.googlesource.com/19336 Reviewed-by: Nigel Tao <nigeltao@golang.org> Reviewed-by: Joe Tsai <joetsai@digital-static.net> Run-TryBot: Joe Tsai <joetsai@digital-static.net> TryBot-Result: Gobot Gobot <gobot@golang.org>		2016-03-11 17:40:52 +00:00
..
android	misc/android: cleaner to remove stale GOROOT files	2015-05-25 20:52:10 +00:00
arm	arm: add gdb support to android launcher script	2010-07-30 10:35:07 +03:00
cgo	misc/cgo/test: rewrite windows version of mysleep	2016-03-02 23:33:32 +00:00
chrome/gophertool	all: link to https instead of http	2015-07-11 14:36:33 +00:00
git	misc/git: Fix non-literal period in pre-commit grep	2016-02-26 19:06:38 +00:00
ios	misc/ios: keep whole buffer in go_darwin_arm_exec	2015-11-04 20:00:35 +00:00
linkcheck	misc/linkcheck: better redirect handling, use meaningful exit code	2013-10-25 17:31:02 +03:00
nacl	compress/flate: optimize huffman bit encoder	2016-03-11 17:40:52 +00:00
sortac	misc/sortac: add tool to sort the AUTHORS and CONTRIBUTORS files	2015-11-12 17:07:09 +00:00
swig	misc/swig/callback: fix test for SWIG -cgo support	2015-03-06 15:28:50 +00:00
trace	cmd/trace: fix time scale	2015-07-01 10:37:10 +00:00
benchcmp	all: use golang.org/x/... import paths	2014-11-10 09:15:57 +11:00
editors	all: don't refer to code.google.com/p/go{,-wiki}/	2015-02-06 14:41:47 +00:00