snappy-go: Improve encode performance a bit.
Incorporates additional changes suggested by Dmitry Chestnykh,
which proved to gain even some more speed up.
$ benchcmp old.txt new.txt
benchmark old ns/op new ns/op delta
BenchmarkWordsDecode1e3 6795 6823 +0.41%
BenchmarkWordsDecode1e4 67244 67337 +0.14%
BenchmarkWordsDecode1e5 692152 693272 +0.16%
BenchmarkWordsDecode1e6 6014484 6022518 +0.13%
BenchmarkWordsEncode1e3 24069 22256 -7.53%
BenchmarkWordsEncode1e4 155522 130625 -16.01%
BenchmarkWordsEncode1e5 1451341 1342459 -7.50%
BenchmarkWordsEncode1e6 11588325 10801803 -6.79%
Benchmark_UFlat0 324272 324723 +0.14%
Benchmark_UFlat1 3054906 3061657 +0.22%
Benchmark_UFlat2 34889 34955 +0.19%
Benchmark_UFlat3 106121 106247 +0.12%
Benchmark_UFlat4 1301508 1303304 +0.14%
Benchmark_UFlat5 117178 117506 +0.28%
Benchmark_UFlat6 52977 53008 +0.06%
Benchmark_UFlat7 17865 17895 +0.17%
Benchmark_UFlat8 4049196 4066785 +0.43%
Benchmark_UFlat9 935762 938304 +0.27%
Benchmark_UFlat10 808857 811668 +0.35%
Benchmark_UFlat11 2518497 2525181 +0.27%
Benchmark_UFlat12 3269812 3279646 +0.30%
Benchmark_UFlat13 1432980 1434405 +0.10%
Benchmark_UFlat14 195012 195467 +0.23%
Benchmark_UFlat15 22993 23028 +0.15%
Benchmark_UFlat16 327945 328377 +0.13%
Benchmark_UFlat17 827246 828168 +0.11%
Benchmark_ZFlat0 586969 548872 -6.49%
Benchmark_ZFlat1 8081042 7590963 -6.06%
Benchmark_ZFlat2 2229381 1895227 -14.99%
Benchmark_ZFlat3 1409796 1214367 -13.86%
Benchmark_ZFlat4 2254589 2153293 -4.49%
Benchmark_ZFlat5 283640 254657 -10.22%
Benchmark_ZFlat6 128752 106041 -17.64%
Benchmark_ZFlat7 50282 44514 -11.47%
Benchmark_ZFlat8 7295276 6813961 -6.60%
Benchmark_ZFlat9 1947643 1821234 -6.49%
Benchmark_ZFlat10 1723946 1607431 -6.76%
Benchmark_ZFlat11 5202240 4889793 -6.01%
Benchmark_ZFlat12 6877479 6406872 -6.84%
Benchmark_ZFlat13 2504360 2380325 -4.95%
Benchmark_ZFlat14 449529 411485 -8.46%
Benchmark_ZFlat15 67703 57238 -15.46%
Benchmark_ZFlat16 599605 560547 -6.51%
Benchmark_ZFlat17 1512113 1364405 -9.77%
benchmark old MB/s new MB/s speedup
BenchmarkWordsDecode1e3 147.16 146.55 1.00x
BenchmarkWordsDecode1e4 148.71 148.51 1.00x
BenchmarkWordsDecode1e5 144.48 144.24 1.00x
BenchmarkWordsDecode1e6 166.27 166.04 1.00x
BenchmarkWordsEncode1e3 41.55 44.93 1.08x
BenchmarkWordsEncode1e4 64.30 76.55 1.19x
BenchmarkWordsEncode1e5 68.90 74.49 1.08x
BenchmarkWordsEncode1e6 86.29 92.58 1.07x
Benchmark_UFlat0 315.78 315.34 1.00x
Benchmark_UFlat1 229.82 229.32 1.00x
Benchmark_UFlat2 3638.81 3632.04 1.00x
Benchmark_UFlat3 888.89 887.83 1.00x
Benchmark_UFlat4 314.71 314.28 1.00x
Benchmark_UFlat5 209.96 209.38 1.00x
Benchmark_UFlat6 210.47 210.34 1.00x
Benchmark_UFlat7 208.28 207.93 1.00x
Benchmark_UFlat8 254.31 253.21 1.00x
Benchmark_UFlat9 162.53 162.09 1.00x
Benchmark_UFlat10 154.76 154.22 1.00x
Benchmark_UFlat11 169.45 169.00 1.00x
Benchmark_UFlat12 147.37 146.92 1.00x
Benchmark_UFlat13 358.15 357.79 1.00x
Benchmark_UFlat14 196.09 195.63 1.00x
Benchmark_UFlat15 183.84 183.56 1.00x
Benchmark_UFlat16 361.61 361.13 1.00x
Benchmark_UFlat17 222.81 222.56 1.00x
Benchmark_ZFlat0 174.46 186.56 1.07x
Benchmark_ZFlat1 86.88 92.49 1.06x
Benchmark_ZFlat2 56.95 66.99 1.18x
Benchmark_ZFlat3 66.91 77.68 1.16x
Benchmark_ZFlat4 181.67 190.22 1.05x
Benchmark_ZFlat5 86.74 96.61 1.11x
Benchmark_ZFlat6 86.60 105.15 1.21x
Benchmark_ZFlat7 74.00 83.59 1.13x
Benchmark_ZFlat8 141.15 151.12 1.07x
Benchmark_ZFlat9 78.09 83.51 1.07x
Benchmark_ZFlat10 72.61 77.88 1.07x
Benchmark_ZFlat11 82.03 87.27 1.06x
Benchmark_ZFlat12 70.06 75.21 1.07x
Benchmark_ZFlat13 204.93 215.61 1.05x
Benchmark_ZFlat14 85.07 92.93 1.09x
Benchmark_ZFlat15 62.43 73.85 1.18x
Benchmark_ZFlat16 197.78 211.56 1.07x
Benchmark_ZFlat17 121.90 135.09 1.11x
$
R=nigeltao, dchest
CC=golang-dev
https://codereview.appspot.com/7346051
Committer: Nigel Tao <nigeltao@golang.org>
1 file changed
