mirror of https://github.com/google/snappy.git
368 Commits
| Author | SHA1 | Message | Date |
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alkis
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3c706d2230 |
Make UnalignedCopy64 not exhibit undefined behavior when src and dst overlap.
name old speed new speed delta BM_UFlat/0 3.09GB/s ± 3% 3.07GB/s ± 2% -0.78% (p=0.009 n=19+19) BM_UFlat/1 1.63GB/s ± 2% 1.62GB/s ± 2% ~ (p=0.099 n=19+20) BM_UFlat/2 19.7GB/s ±19% 20.7GB/s ±11% ~ (p=0.054 n=20+19) BM_UFlat/3 1.61GB/s ± 2% 1.60GB/s ± 1% -0.48% (p=0.049 n=20+17) BM_UFlat/4 15.8GB/s ± 7% 15.6GB/s ±10% ~ (p=0.234 n=20+20) BM_UFlat/5 2.47GB/s ± 1% 2.46GB/s ± 2% ~ (p=0.608 n=19+19) BM_UFlat/6 1.07GB/s ± 2% 1.07GB/s ± 1% ~ (p=0.128 n=20+19) BM_UFlat/7 1.01GB/s ± 1% 1.00GB/s ± 2% ~ (p=0.656 n=15+19) BM_UFlat/8 1.13GB/s ± 1% 1.13GB/s ± 1% ~ (p=0.532 n=18+19) BM_UFlat/9 918MB/s ± 1% 916MB/s ± 1% ~ (p=0.443 n=19+18) BM_UFlat/10 3.90GB/s ± 1% 3.90GB/s ± 1% ~ (p=0.895 n=20+19) BM_UFlat/11 1.30GB/s ± 1% 1.29GB/s ± 2% ~ (p=0.156 n=19+19) BM_UFlat/12 2.35GB/s ± 2% 2.34GB/s ± 1% ~ (p=0.349 n=19+17) BM_UFlat/13 2.07GB/s ± 1% 2.06GB/s ± 2% ~ (p=0.475 n=18+19) BM_UFlat/14 2.23GB/s ± 1% 2.23GB/s ± 1% ~ (p=0.983 n=19+19) BM_UFlat/15 1.55GB/s ± 1% 1.55GB/s ± 1% ~ (p=0.314 n=19+19) BM_UFlat/16 1.26GB/s ± 1% 1.26GB/s ± 1% ~ (p=0.907 n=15+18) BM_UFlat/17 2.32GB/s ± 1% 2.32GB/s ± 1% ~ (p=0.604 n=18+19) BM_UFlat/18 1.61GB/s ± 1% 1.61GB/s ± 1% ~ (p=0.212 n=18+19) BM_UFlat/19 1.78GB/s ± 1% 1.78GB/s ± 2% ~ (p=0.350 n=19+19) BM_UFlat/20 1.89GB/s ± 1% 1.90GB/s ± 2% ~ (p=0.092 n=19+19) Also tested the current version against UNALIGNED_STORE64(dst, UNALIGNED_LOAD64(src)), there is no difference (old is memcpy, new is UNALIGNED*): name old speed new speed delta BM_UFlat/0 3.14GB/s ± 1% 3.16GB/s ± 2% ~ (p=0.156 n=19+19) BM_UFlat/1 1.62GB/s ± 1% 1.61GB/s ± 2% ~ (p=0.102 n=19+20) BM_UFlat/2 18.8GB/s ±17% 19.1GB/s ±11% ~ (p=0.390 n=20+16) BM_UFlat/3 1.59GB/s ± 1% 1.58GB/s ± 1% -1.06% (p=0.000 n=18+18) BM_UFlat/4 15.8GB/s ± 6% 15.6GB/s ± 7% ~ (p=0.184 n=19+20) BM_UFlat/5 2.46GB/s ± 1% 2.44GB/s ± 1% -0.95% (p=0.000 n=19+18) BM_UFlat/6 1.08GB/s ± 1% 1.06GB/s ± 1% -1.17% (p=0.000 n=19+18) BM_UFlat/7 1.00GB/s ± 1% 0.99GB/s ± 1% -1.16% (p=0.000 n=19+18) BM_UFlat/8 1.14GB/s ± 2% 1.12GB/s ± 1% -1.12% (p=0.000 n=19+18) BM_UFlat/9 921MB/s ± 1% 914MB/s ± 1% -0.84% (p=0.000 n=20+17) BM_UFlat/10 3.94GB/s ± 2% 3.92GB/s ± 1% ~ (p=0.058 n=19+17) BM_UFlat/11 1.29GB/s ± 1% 1.28GB/s ± 1% -0.77% (p=0.001 n=19+17) BM_UFlat/12 2.34GB/s ± 1% 2.31GB/s ± 1% -1.10% (p=0.000 n=18+18) BM_UFlat/13 2.06GB/s ± 1% 2.05GB/s ± 1% -0.73% (p=0.001 n=19+18) BM_UFlat/14 2.22GB/s ± 1% 2.20GB/s ± 1% -0.73% (p=0.000 n=18+18) BM_UFlat/15 1.55GB/s ± 1% 1.53GB/s ± 1% -1.07% (p=0.000 n=19+18) BM_UFlat/16 1.26GB/s ± 1% 1.25GB/s ± 1% -0.79% (p=0.000 n=18+18) BM_UFlat/17 2.31GB/s ± 1% 2.29GB/s ± 1% -0.98% (p=0.000 n=20+18) BM_UFlat/18 1.61GB/s ± 1% 1.60GB/s ± 2% -0.71% (p=0.001 n=20+19) BM_UFlat/19 1.77GB/s ± 1% 1.76GB/s ± 1% -0.61% (p=0.007 n=19+18) BM_UFlat/20 1.89GB/s ± 1% 1.88GB/s ± 1% -0.75% (p=0.000 n=20+18) |
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skanev
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d3c6d20d0a |
Add compression size reporting hooks.
Also, force inlining util::compression::Sample(). The inlining change is necessary. Without it even with FDO+LIPO the call doesn't get inlined and uses 4 registers to construct parameters (which won't be used in the common case). In some of the more compute-bound tests that causes extra spills and significant overhead (even if call is sufficiently long). For example, with inlining: BM_UFlat/0 32.7µs ± 1% 33.1µs ± 1% +1.41% without: BM_UFlat/0 32.7µs ± 1% 37.7µs ± 1% +15.29% |
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alkis
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626e1b9faa | Use #ifdef __SSE2__ for the emmintrin.h include, otherwise snappy.cc does not compile with -march=prescott. | |
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Alkis Evlogimenos
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2d99bd14d4 | 1.1.4 release. | |
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Alkis Evlogimenos
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8bfb028b61 |
Improve zippy decompression speed.
The CL contains the following optimizations: 1) rewrite IncrementalCopy routine: single routine that splits the code into sections based on typical probabilities observed across a variety of inputs and helps reduce branch mispredictions both for FDO and non-FDO builds. IncrementalCopy is an adaptive routine that selects the best strategy based on input. 2) introduce UnalignedCopy128 that copies 128 bits per cycle using SSE2. 3) add branch hint for the main decoding loop. The non-literal case is taken more often in benchmarks. I expect this to be a noop in production with FDO. Note that this became apparent after step 1 above. 4) use the new IncrementalCopy in ZippyScatteredWriter. I test two archs: x86_haswell and ppc_power8. For x86_haswell I use FDO. For ppc_power8 I do not use FDO. x86_haswell + FDO name old speed new speed delta BM_UCord/0 1.97GB/s ± 1% 3.19GB/s ± 1% +62.08% (p=0.000 n=19+18) BM_UCord/1 1.28GB/s ± 1% 1.51GB/s ± 1% +18.14% (p=0.000 n=19+18) BM_UCord/2 15.6GB/s ± 9% 15.5GB/s ± 7% ~ (p=0.620 n=20+20) BM_UCord/3 811MB/s ± 1% 808MB/s ± 1% -0.38% (p=0.009 n=17+18) BM_UCord/4 12.4GB/s ± 4% 12.7GB/s ± 8% +2.70% (p=0.002 n=17+20) BM_UCord/5 1.77GB/s ± 0% 2.33GB/s ± 1% +31.37% (p=0.000 n=18+18) BM_UCord/6 900MB/s ± 1% 1006MB/s ± 1% +11.71% (p=0.000 n=18+17) BM_UCord/7 858MB/s ± 1% 938MB/s ± 2% +9.36% (p=0.000 n=19+16) BM_UCord/8 921MB/s ± 1% 985MB/s ±21% +6.94% (p=0.028 n=19+20) BM_UCord/9 824MB/s ± 1% 800MB/s ±20% ~ (p=0.113 n=19+20) BM_UCord/10 2.60GB/s ± 1% 3.67GB/s ±21% +41.31% (p=0.000 n=19+20) BM_UCord/11 1.07GB/s ± 1% 1.21GB/s ± 1% +13.17% (p=0.000 n=16+16) BM_UCord/12 1.84GB/s ± 8% 2.18GB/s ± 1% +18.44% (p=0.000 n=16+19) BM_UCord/13 1.83GB/s ±18% 1.89GB/s ± 1% +3.14% (p=0.000 n=17+19) BM_UCord/14 1.96GB/s ± 2% 1.97GB/s ± 1% +0.55% (p=0.000 n=16+17) BM_UCord/15 1.30GB/s ±20% 1.43GB/s ± 1% +9.85% (p=0.000 n=20+20) BM_UCord/16 658MB/s ±20% 705MB/s ± 1% +7.22% (p=0.000 n=20+19) BM_UCord/17 1.96GB/s ± 2% 2.15GB/s ± 1% +9.73% (p=0.000 n=16+19) BM_UCord/18 555MB/s ± 1% 833MB/s ± 1% +50.11% (p=0.000 n=18+19) BM_UCord/19 1.57GB/s ± 1% 1.75GB/s ± 1% +11.34% (p=0.000 n=20+20) BM_UCord/20 1.72GB/s ± 2% 1.70GB/s ± 2% -1.01% (p=0.001 n=20+20) BM_UCordStringSink/0 2.88GB/s ± 1% 3.15GB/s ± 1% +9.56% (p=0.000 n=17+20) BM_UCordStringSink/1 1.50GB/s ± 1% 1.52GB/s ± 1% +1.96% (p=0.000 n=19+20) BM_UCordStringSink/2 14.5GB/s ±10% 14.6GB/s ±10% ~ (p=0.542 n=20+20) BM_UCordStringSink/3 1.06GB/s ± 1% 1.08GB/s ± 1% +1.77% (p=0.000 n=18+20) BM_UCordStringSink/4 12.6GB/s ± 7% 13.2GB/s ± 4% +4.63% (p=0.000 n=20+20) BM_UCordStringSink/5 2.29GB/s ± 1% 2.36GB/s ± 1% +3.05% (p=0.000 n=19+20) BM_UCordStringSink/6 1.01GB/s ± 2% 1.01GB/s ± 0% ~ (p=0.055 n=20+18) BM_UCordStringSink/7 945MB/s ± 1% 939MB/s ± 1% -0.60% (p=0.000 n=19+20) BM_UCordStringSink/8 1.06GB/s ± 1% 1.07GB/s ± 1% +0.62% (p=0.000 n=18+20) BM_UCordStringSink/9 866MB/s ± 1% 864MB/s ± 1% ~ (p=0.107 n=19+20) BM_UCordStringSink/10 3.64GB/s ± 2% 3.98GB/s ± 1% +9.32% (p=0.000 n=19+20) BM_UCordStringSink/11 1.22GB/s ± 1% 1.22GB/s ± 1% +0.61% (p=0.001 n=19+20) BM_UCordStringSink/12 2.23GB/s ± 1% 2.23GB/s ± 1% ~ (p=0.692 n=19+20) BM_UCordStringSink/13 1.96GB/s ± 1% 1.94GB/s ± 1% -0.82% (p=0.000 n=17+18) BM_UCordStringSink/14 2.09GB/s ± 2% 2.08GB/s ± 1% ~ (p=0.147 n=20+18) BM_UCordStringSink/15 1.47GB/s ± 1% 1.45GB/s ± 1% -0.88% (p=0.000 n=20+19) BM_UCordStringSink/16 908MB/s ± 1% 917MB/s ± 1% +0.97% (p=0.000 n=19+19) BM_UCordStringSink/17 2.11GB/s ± 1% 2.20GB/s ± 1% +4.35% (p=0.000 n=18+20) BM_UCordStringSink/18 804MB/s ± 2% 1106MB/s ± 1% +37.52% (p=0.000 n=20+20) BM_UCordStringSink/19 1.67GB/s ± 1% 1.72GB/s ± 0% +2.81% (p=0.000 n=18+20) BM_UCordStringSink/20 1.77GB/s ± 3% 1.77GB/s ± 3% ~ (p=0.815 n=20+20) ppc_power8 name old speed new speed delta BM_UCord/0 918MB/s ± 6% 1262MB/s ± 0% +37.56% (p=0.000 n=17+16) BM_UCord/1 671MB/s ±13% 879MB/s ± 2% +30.99% (p=0.000 n=18+16) BM_UCord/2 12.6GB/s ± 8% 12.6GB/s ± 5% ~ (p=0.452 n=17+19) BM_UCord/3 285MB/s ±10% 284MB/s ± 4% -0.50% (p=0.021 n=19+17) BM_UCord/4 5.21GB/s ±12% 6.59GB/s ± 1% +26.37% (p=0.000 n=17+16) BM_UCord/5 913MB/s ± 4% 1253MB/s ± 1% +37.27% (p=0.000 n=16+17) BM_UCord/6 461MB/s ±13% 547MB/s ± 1% +18.67% (p=0.000 n=18+16) BM_UCord/7 455MB/s ± 2% 524MB/s ± 3% +15.28% (p=0.000 n=16+18) BM_UCord/8 489MB/s ± 2% 584MB/s ± 2% +19.47% (p=0.000 n=17+17) BM_UCord/9 410MB/s ±33% 490MB/s ± 1% +19.64% (p=0.000 n=17+18) BM_UCord/10 1.10GB/s ± 3% 1.55GB/s ± 2% +41.21% (p=0.000 n=16+16) BM_UCord/11 494MB/s ± 1% 558MB/s ± 1% +12.92% (p=0.000 n=17+18) BM_UCord/12 608MB/s ± 3% 793MB/s ± 1% +30.45% (p=0.000 n=17+16) BM_UCord/13 545MB/s ±18% 721MB/s ± 2% +32.22% (p=0.000 n=19+17) BM_UCord/14 594MB/s ± 4% 748MB/s ± 3% +25.99% (p=0.000 n=17+17) BM_UCord/15 628MB/s ± 1% 822MB/s ± 3% +30.94% (p=0.000 n=18+16) BM_UCord/16 277MB/s ± 2% 280MB/s ±15% +0.86% (p=0.001 n=17+17) BM_UCord/17 864MB/s ± 1% 1001MB/s ± 3% +15.96% (p=0.000 n=17+17) BM_UCord/18 121MB/s ± 2% 284MB/s ± 4% +134.08% (p=0.000 n=17+18) BM_UCord/19 594MB/s ± 0% 713MB/s ± 2% +19.93% (p=0.000 n=16+17) BM_UCord/20 553MB/s ±10% 662MB/s ± 5% +19.74% (p=0.000 n=16+18) BM_UCordStringSink/0 1.37GB/s ± 4% 1.48GB/s ± 2% +8.51% (p=0.000 n=16+16) BM_UCordStringSink/1 969MB/s ± 1% 990MB/s ± 1% +2.16% (p=0.000 n=16+18) BM_UCordStringSink/2 13.1GB/s ±11% 13.0GB/s ±14% ~ (p=0.858 n=17+18) BM_UCordStringSink/3 411MB/s ± 1% 415MB/s ± 1% +0.93% (p=0.000 n=16+17) BM_UCordStringSink/4 6.81GB/s ± 8% 7.29GB/s ± 5% +7.12% (p=0.000 n=16+19) BM_UCordStringSink/5 1.35GB/s ± 5% 1.45GB/s ±13% +8.00% (p=0.000 n=16+17) BM_UCordStringSink/6 653MB/s ± 8% 653MB/s ± 3% -0.12% (p=0.007 n=17+19) BM_UCordStringSink/7 618MB/s ±13% 597MB/s ±18% -3.45% (p=0.001 n=18+18) BM_UCordStringSink/8 702MB/s ± 5% 702MB/s ± 1% -0.10% (p=0.012 n=17+16) BM_UCordStringSink/9 590MB/s ± 2% 564MB/s ±13% -4.46% (p=0.000 n=16+17) BM_UCordStringSink/10 1.63GB/s ± 2% 1.76GB/s ± 4% +8.28% (p=0.000 n=17+16) BM_UCordStringSink/11 630MB/s ±14% 684MB/s ±15% +8.51% (p=0.000 n=19+17) BM_UCordStringSink/12 858MB/s ±12% 903MB/s ± 9% +5.17% (p=0.000 n=19+17) BM_UCordStringSink/13 806MB/s ±22% 879MB/s ± 1% +8.98% (p=0.000 n=19+19) BM_UCordStringSink/14 854MB/s ±13% 901MB/s ± 5% +5.60% (p=0.000 n=19+17) BM_UCordStringSink/15 930MB/s ± 2% 964MB/s ± 3% +3.59% (p=0.000 n=16+16) BM_UCordStringSink/16 363MB/s ±10% 356MB/s ± 6% ~ (p=0.050 n=20+19) BM_UCordStringSink/17 976MB/s ±12% 1078MB/s ± 1% +10.52% (p=0.000 n=20+17) BM_UCordStringSink/18 227MB/s ± 1% 355MB/s ± 3% +56.45% (p=0.000 n=16+17) BM_UCordStringSink/19 751MB/s ± 4% 808MB/s ± 4% +7.70% (p=0.000 n=18+17) BM_UCordStringSink/20 761MB/s ± 8% 786MB/s ± 4% +3.23% (p=0.000 n=18+17) |
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Behzad Nouri
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818b583387 | adds std:: to stl types (#061) | |
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Geoff Pike
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27c5d86527 |
Re-work fast path for handling copies in zippy decompression.
This is a performance-tuning change that shouldn't change the behavior of the library. This adds some complexity but the performance gain might make that worthwhile: With FDO on perflab/haswell, a 4.0% gain (geometric mean). SAMPLE (before) Benchmark Time(ns) CPU(ns) Iterations ------------------------------------------------ BM_UFlat/0 36638 36552 100000 2.6GB/s html BM_UFlat/1 457153 455895 9173 1.4GB/s urls BM_UFlat/2 5850 5837 685481 19.6GB/s jpg BM_UFlat/3 122 122 34551988 1.5GB/s jpg_200 BM_UFlat/4 6797 6781 620811 14.1GB/s pdf BM_UFlat/5 179485 179037 23471 2.1GB/s html4 BM_UFlat/6 142734 142384 29525 1018.7MB/s txt1 BM_UFlat/7 125233 124924 33709 955.6MB/s txt2 BM_UFlat/8 382548 381533 10000 1066.7MB/s txt3 BM_UFlat/9 525614 524297 8018 876.5MB/s txt4 BM_UFlat/10 34946 34868 100000 3.2GB/s pb BM_UFlat/11 149548 149208 28063 1.2GB/s gaviota BM_UFlat/12 10684 10663 392580 2.1GB/s cp BM_UFlat/13 5494 5484 766584 1.9GB/s c BM_UFlat/14 1691 1688 2488784 2.1GB/s lsp BM_UFlat/15 676443 674726 6129 1.4GB/s xls BM_UFlat/16 156 156 26656909 1.2GB/s xls_200 BM_UFlat/17 239911 239297 17558 2.0GB/s bin BM_UFlat/18 182 182 23072932 1047.9MB/s bin_200 BM_UFlat/19 21544 21499 194484 1.7GB/s sum BM_UFlat/20 2236 2232 1877810 1.8GB/s man BM_UFlatSink/0 42266 42179 99732 2.3GB/s html BM_UFlatSink/1 461810 460633 9055 1.4GB/s urls BM_UFlatSink/2 5816 5804 632829 19.8GB/s jpg BM_UFlatSink/3 124 123 34351698 1.5GB/s jpg_200 BM_UFlatSink/4 7173 7157 609929 13.3GB/s pdf BM_UFlatSink/5 184795 184302 22660 2.1GB/s html4 BM_UFlatSink/6 143552 143223 29272 1012.7MB/s txt1 BM_UFlatSink/7 127160 126890 33178 940.8MB/s txt2 BM_UFlatSink/8 382219 381313 10000 1067.3MB/s txt3 BM_UFlatSink/9 528042 526713 7988 872.5MB/s txt4 BM_UFlatSink/10 41389 41305 100000 2.7GB/s pb BM_UFlatSink/11 147215 146877 28854 1.2GB/s gaviota BM_UFlatSink/12 12008 11984 348139 1.9GB/s cp BM_UFlatSink/13 5444 5433 775084 1.9GB/s c BM_UFlatSink/14 1647 1644 2552119 2.1GB/s lsp BM_UFlatSink/15 665011 663424 6320 1.4GB/s xls BM_UFlatSink/16 153 153 27571837 1.2GB/s xls_200 BM_UFlatSink/17 239735 239169 17411 2.0GB/s bin BM_UFlatSink/18 183 182 23005573 1046.8MB/s bin_200 BM_UFlatSink/19 22544 22498 187705 1.6GB/s sum BM_UFlatSink/20 2190 2186 1917894 1.8GB/s man SAMPLE (after) Benchmark Time(ns) CPU(ns) Iterations ------------------------------------------------ BM_UFlat/0 33940 33889 100000 2.8GB/s html BM_UFlat/1 440728 439944 9586 1.5GB/s urls BM_UFlat/2 5652 5641 744776 20.3GB/s jpg BM_UFlat/3 123 123 34647884 1.5GB/s jpg_200 BM_UFlat/4 6628 6615 631892 14.4GB/s pdf BM_UFlat/5 169523 169227 24197 2.3GB/s html4 BM_UFlat/6 144139 143892 29232 1008.0MB/s txt1 BM_UFlat/7 127148 126915 33144 940.6MB/s txt2 BM_UFlat/8 380267 379233 10000 1073.2MB/s txt3 BM_UFlat/9 529495 528194 7957 870.0MB/s txt4 BM_UFlat/10 31844 31784 100000 3.5GB/s pb BM_UFlat/11 146822 146476 28737 1.2GB/s gaviota BM_UFlat/12 10784 10762 392176 2.1GB/s cp BM_UFlat/13 5528 5518 760934 1.9GB/s c BM_UFlat/14 1721 1719 2449291 2.0GB/s lsp BM_UFlat/15 673304 671774 6255 1.4GB/s xls BM_UFlat/16 155 155 27092003 1.2GB/s xls_200 BM_UFlat/17 230424 229902 18285 2.1GB/s bin BM_UFlat/18 185 184 22818199 1033.9MB/s bin_200 BM_UFlat/19 21035 20996 200765 1.7GB/s sum BM_UFlat/20 2242 2238 1864380 1.8GB/s man BM_UFlatSink/0 33487 33405 100000 2.9GB/s html BM_UFlatSink/1 431108 430226 9764 1.5GB/s urls BM_UFlatSink/2 5927 5916 648112 19.4GB/s jpg BM_UFlatSink/3 123 122 34704423 1.5GB/s jpg_200 BM_UFlatSink/4 6472 6461 653462 14.8GB/s pdf BM_UFlatSink/5 164309 163988 25567 2.3GB/s html4 BM_UFlatSink/6 138274 138020 30311 1050.9MB/s txt1 BM_UFlatSink/7 120844 120637 34708 989.6MB/s txt2 BM_UFlatSink/8 371046 370366 10000 1098.9MB/s txt3 BM_UFlatSink/9 510021 508982 8269 902.9MB/s txt4 BM_UFlatSink/10 30889 30844 100000 3.6GB/s pb BM_UFlatSink/11 140752 140521 29903 1.2GB/s gaviota BM_UFlatSink/12 10162 10146 413600 2.3GB/s cp BM_UFlatSink/13 5264 5256 762398 2.0GB/s c BM_UFlatSink/14 1622 1619 2606069 2.1GB/s lsp BM_UFlatSink/15 646897 645756 6512 1.5GB/s xls BM_UFlatSink/16 150 150 28223595 1.2GB/s xls_200 BM_UFlatSink/17 226096 225650 18629 2.1GB/s bin BM_UFlatSink/18 185 184 22907935 1035.3MB/s bin_200 BM_UFlatSink/19 21369 21335 198881 1.7GB/s sum BM_UFlatSink/20 2139 2136 1953637 1.8GB/s man |
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Sriraman Tallam
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4a74094080 |
Speed up Zippy decompression in PIE mode by removing the penalty for
global array access. With PIE, accessing global arrays needs two instructions whereas it can be done with a single instruction without PIE. See [] For example, without PIE the access looks like: mov 0x400780(,%rdi,4),%eax // One instruction to access arr[i] and with PIE the access looks like: lea 0x149(%rip),%rax # 400780 <_ZL3arr> mov (%rax,%rdi,4),%eax This causes a slow down in zippy as it has two global arrays, wordmask and char_table. There is no equivalent PC-relative insn. with PIE to do this in one instruction. The slow down can be seen as an increase in dynamic instruction count and cycles with a similar IPC. We have seen this affect REDACTED recently and this is causing a ~1% perf. slow down. One of the mitigation techniques for small arrays is to move it onto the stack, use the stack pointer to make the access a single instruction. The downside to this is the extra instructions at function call to mov the array onto the stack which is why we want to do this only for small arrays. I tried moving wordmask onto the stack since it is a small array. The performance numbers look good overall. There is an improvement in the dynamic instruction count for almost all BM_UFlat benchmarks. BM_UFlat/2 and BM_UFlat/3 are pretty noisy. The only case where there is a regression is BM_UFlat/10. Here, the instruction count does go down but the IPC also goes down affecting performance. This also looks noisy but I do see a small IPC drop with this change. Otherwise, the numbers look good and consistent. I measured this on a perflab ivybridge machine multiple times. Numbers are given below. For Improv. (improvements), positive is good. Binaries built as: blaze build -c opt --dynamic_mode=off Benchmark Base CPU(ns) Opt CPU(ns) Improv. Base Cycles Opt Cycles Improv. Base Insns Opt Insns Improv. BM_UFlat/1 541711 537052 0.86% 46068129918 45442732684 1.36% 85113352848 83917656016 1.40% BM_UFlat/2 6228 6388 -2.57% 582789808 583267855 -0.08% 1261517746 1261116553 0.03% BM_UFlat/3 159 120 24.53% 61538641 58783800 4.48% 90008672 90980060 -1.08% BM_UFlat/4 7878 7787 1.16% 710491888 703718556 0.95% 1914898283 1525060250 20.36% BM_UFlat/5 208854 207673 0.57% 17640846255 17609530720 0.18% 36546983483 36008920788 1.47% BM_UFlat/6 172595 167225 3.11% 14642082831 14232371166 2.80% 33647820489 33056659600 1.76% BM_UFlat/7 152364 147901 2.93% 12904338645 12635220582 2.09% 28958390984 28457982504 1.73% BM_UFlat/8 463764 448244 3.35% 39423576973 37917435891 3.82% 88350964483 86800265943 1.76% BM_UFlat/9 639517 621811 2.77% 54275945823 52555988926 3.17% 119503172410 117432599704 1.73% BM_UFlat/10 41929 42358 -1.02% 3593125535 3647231492 -1.51% 8559206066 8446526639 1.32% BM_UFlat/11 174754 173936 0.47% 14885371426 14749410955 0.91% 36693421142 35987215897 1.92% BM_UFlat/12 13388 13257 0.98% 1192648670 1179645044 1.09% 3506482177 3454962579 1.47% BM_UFlat/13 6801 6588 3.13% 627960003 608367286 3.12% 1847877894 1818368400 1.60% BM_UFlat/14 2057 1989 3.31% 229005588 217393157 5.07% 609686274 599419511 1.68% BM_UFlat/15 831618 799881 3.82% 70440388955 67911853013 3.59% 167178603105 164653652416 1.51% BM_UFlat/16 199 199 0.00% 70109081 68747579 1.94% 106263639 105569531 0.65% BM_UFlat/17 279031 273890 1.84% 23361373312 23294246637 0.29% 40474834585 39981682217 1.22% BM_UFlat/18 233 199 14.59% 74530664 67841101 8.98% 94305848 92271053 2.16% BM_UFlat/19 26743 25309 5.36% 2327215133 2206712016 5.18% 6024314357 5935228694 1.48% BM_UFlat/20 2731 2625 3.88% 282018757 276772813 1.86% 768382519 758277029 1.32% Is this a reasonable work-around for the problem? Do you need more performance measurements? haih@ is evaluating this change for [] and I will update those numbers once we have it. Tested: Performance with zippy_unittest. |
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Geoff Pike
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38a5ec5fca |
Re-work fast path that emits copies in zippy compression.
The primary motivation for the change is that FindMatchLength is likely to discover a difference in the first 8 bytes it compares. If that occurs then we know the length of the match is less than 12, because FindMatchLength is invoked after a 4-byte match is found. When emitting a copy, it is useful to know that the length is less than 12 because the two-byte variant of an emitted copy requires that. This is a performance-tuning change that should not affect the library's behavior. With FDO on perflab/Haswell the geometric mean for ZFlat/* went from 47,290ns to 45,741ns, an improvement of 3.4%. SAMPLE (before) BM_ZFlat/0 102824 102650 40691 951.4MB/s html (22.31 %) BM_ZFlat/1 1293512 1290442 3225 518.9MB/s urls (47.78 %) BM_ZFlat/2 10373 10353 417959 11.1GB/s jpg (99.95 %) BM_ZFlat/3 268 268 15745324 712.4MB/s jpg_200 (73.00 %) BM_ZFlat/4 12137 12113 342462 7.9GB/s pdf (83.30 %) BM_ZFlat/5 430672 429720 9724 909.0MB/s html4 (22.52 %) BM_ZFlat/6 420541 419636 9833 345.6MB/s txt1 (57.88 %) BM_ZFlat/7 373829 373158 10000 319.9MB/s txt2 (61.91 %) BM_ZFlat/8 1119014 1116604 3755 364.5MB/s txt3 (54.99 %) BM_ZFlat/9 1544203 1540657 2748 298.3MB/s txt4 (66.26 %) BM_ZFlat/10 91041 90866 46002 1.2GB/s pb (19.68 %) BM_ZFlat/11 332766 331990 10000 529.5MB/s gaviota (37.72 %) BM_ZFlat/12 39960 39886 100000 588.3MB/s cp (48.12 %) BM_ZFlat/13 14493 14465 287181 735.1MB/s c (42.47 %) BM_ZFlat/14 4447 4440 947927 799.3MB/s lsp (48.37 %) BM_ZFlat/15 1316362 1313350 3196 747.7MB/s xls (41.23 %) BM_ZFlat/16 312 311 10000000 613.0MB/s xls_200 (78.00 %) BM_ZFlat/17 388471 387502 10000 1.2GB/s bin (18.11 %) BM_ZFlat/18 65 64 64838208 2.9GB/s bin_200 (7.50 %) BM_ZFlat/19 65900 65787 63099 554.3MB/s sum (48.96 %) BM_ZFlat/20 6188 6177 681951 652.6MB/s man (59.21 %) SAMPLE (after) Benchmark Time(ns) CPU(ns) Iterations -------------------------------------------- BM_ZFlat/0 99259 99044 42428 986.0MB/s html (22.31 %) BM_ZFlat/1 1257039 1255276 3341 533.4MB/s urls (47.78 %) BM_ZFlat/2 10044 10030 405781 11.4GB/s jpg (99.95 %) BM_ZFlat/3 268 267 15732282 713.3MB/s jpg_200 (73.00 %) BM_ZFlat/4 11675 11657 358629 8.2GB/s pdf (83.30 %) BM_ZFlat/5 420951 419818 9739 930.5MB/s html4 (22.52 %) BM_ZFlat/6 415460 414632 10000 349.8MB/s txt1 (57.88 %) BM_ZFlat/7 367191 366436 10000 325.8MB/s txt2 (61.91 %) BM_ZFlat/8 1098345 1096036 3819 371.3MB/s txt3 (54.99 %) BM_ZFlat/9 1508701 1505306 2758 305.3MB/s txt4 (66.26 %) BM_ZFlat/10 87195 87031 47289 1.3GB/s pb (19.68 %) BM_ZFlat/11 322338 321637 10000 546.5MB/s gaviota (37.72 %) BM_ZFlat/12 36739 36668 100000 639.9MB/s cp (48.12 %) BM_ZFlat/13 13646 13618 304009 780.9MB/s c (42.47 %) BM_ZFlat/14 4249 4240 992456 837.0MB/s lsp (48.37 %) BM_ZFlat/15 1262925 1260012 3314 779.4MB/s xls (41.23 %) BM_ZFlat/16 308 308 10000000 619.8MB/s xls_200 (78.00 %) BM_ZFlat/17 379750 378944 10000 1.3GB/s bin (18.11 %) BM_ZFlat/18 62 62 67443280 3.0GB/s bin_200 (7.50 %) BM_ZFlat/19 61706 61587 67645 592.1MB/s sum (48.96 %) BM_ZFlat/20 5968 5958 698974 676.6MB/s man (59.21 %) |
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ckennelly
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094c67de88 |
Speed up the EmitLiteral fast path, +1.62% for ZFlat benchmarks.
This is inspired by the Go version in
//third_party/golang/snappy/encode_amd64.s (emitLiteralFastPath)
Benchmark Base:Reference (1)
--------------------------------------------------
(BM_ZFlat_0 1/cputime_ns) 9.669e-06 +1.65%
(BM_ZFlat_1 1/cputime_ns) 7.643e-07 +2.53%
(BM_ZFlat_10 1/cputime_ns) 1.107e-05 -0.97%
(BM_ZFlat_11 1/cputime_ns) 3.002e-06 +0.71%
(BM_ZFlat_12 1/cputime_ns) 2.338e-05 +7.22%
(BM_ZFlat_13 1/cputime_ns) 6.386e-05 +9.18%
(BM_ZFlat_14 1/cputime_ns) 0.0002256 -0.05%
(BM_ZFlat_15 1/cputime_ns) 7.608e-07 -1.29%
(BM_ZFlat_16 1/cputime_ns) 0.003236 -1.28%
(BM_ZFlat_17 1/cputime_ns) 2.58e-06 +0.52%
(BM_ZFlat_18 1/cputime_ns) 0.01538 +0.00%
(BM_ZFlat_19 1/cputime_ns) 1.436e-05 +6.21%
(BM_ZFlat_2 1/cputime_ns) 0.0001044 +4.99%
(BM_ZFlat_20 1/cputime_ns) 0.0001608 -0.18%
(BM_ZFlat_3 1/cputime_ns) 0.003745 +0.38%
(BM_ZFlat_4 1/cputime_ns) 8.144e-05 +6.21%
(BM_ZFlat_5 1/cputime_ns) 2.328e-06 -1.60%
(BM_ZFlat_6 1/cputime_ns) 2.391e-06 +0.06%
(BM_ZFlat_7 1/cputime_ns) 2.68e-06 -0.61%
(BM_ZFlat_8 1/cputime_ns) 8.852e-07 +0.19%
(BM_ZFlat_9 1/cputime_ns) 6.441e-07 +1.06%
geometric mean +1.62%
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Geoff Pike
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fce661fa8c |
Speed up zippy decompression by removing some zero-extensions.
This is a performance tuning change that should not affect correctness. On perflab with FDO on Haswell the performance gain is 21,776ns before vs 21,255ns after, about 2.4%. (Using geometric means.) SAMPLE PERFORMANCE with FDO on HASWELL (NEW) Benchmark Time(ns) CPU(ns) Iterations ------------------------------------------------ BM_UFlat/0 37366 37279 100000 2.6GB/s html BM_UFlat/1 471153 470204 8975 1.4GB/s urls BM_UFlat/2 6116 6105 639496 18.8GB/s jpg BM_UFlat/3 123 123 34709908 1.5GB/s jpg_200 BM_UFlat/4 6724 6714 623318 14.2GB/s pdf BM_UFlat/5 183122 182722 23138 2.1GB/s html4 BM_UFlat/6 144981 144689 29384 1002.5MB/s txt1 BM_UFlat/7 125939 125691 33423 949.8MB/s txt2 BM_UFlat/8 383101 382241 10000 1064.7MB/s txt3 BM_UFlat/9 527824 526606 7958 872.6MB/s txt4 BM_UFlat/10 34849 34790 100000 3.2GB/s pb BM_UFlat/11 150213 149937 28131 1.1GB/s gaviota BM_UFlat/12 10850 10830 393231 2.1GB/s cp BM_UFlat/13 5532 5523 735739 1.9GB/s c BM_UFlat/14 1698 1695 2478035 2.0GB/s lsp BM_UFlat/15 678396 676917 6200 1.4GB/s xls BM_UFlat/16 155 155 26909789 1.2GB/s xls_200 BM_UFlat/17 241235 240698 17416 2.0GB/s bin BM_UFlat/18 183 183 23000841 1043.5MB/s bin_200 BM_UFlat/19 21461 21424 193275 1.7GB/s sum BM_UFlat/20 2232 2228 1887191 1.8GB/s man BM_UFlatSink/0 42272 42199 98528 2.3GB/s html BM_UFlatSink/1 460814 459898 9092 1.4GB/s urls BM_UFlatSink/2 5558 5547 768629 20.7GB/s jpg BM_UFlatSink/3 124 123 33629141 1.5GB/s jpg_200 BM_UFlatSink/4 6634 6621 629989 14.4GB/s pdf BM_UFlatSink/5 182883 182491 23030 2.1GB/s html4 BM_UFlatSink/6 143269 142964 29410 1014.5MB/s txt1 BM_UFlatSink/7 127041 126809 33136 941.4MB/s txt2 BM_UFlatSink/8 384367 383577 10000 1061.0MB/s txt3 BM_UFlatSink/9 529979 528890 7898 868.9MB/s txt4 BM_UFlatSink/10 41154 41075 100000 2.7GB/s pb BM_UFlatSink/11 146446 146155 28742 1.2GB/s gaviota BM_UFlatSink/12 11939 11918 352663 1.9GB/s cp BM_UFlatSink/13 5430 5421 770451 1.9GB/s c BM_UFlatSink/14 1665 1662 2538921 2.1GB/s lsp BM_UFlatSink/15 666840 665617 6309 1.4GB/s xls BM_UFlatSink/16 152 152 27639460 1.2GB/s xls_200 BM_UFlatSink/17 240076 239573 17643 2.0GB/s bin BM_UFlatSink/18 183 182 23128210 1046.0MB/s bin_200 BM_UFlatSink/19 22570 22528 185839 1.6GB/s sum BM_UFlatSink/20 2183 2180 1899526 1.8GB/s man SAMPLE PERFORMANCE with FDO on HASWELL (OLD) Benchmark Time(ns) CPU(ns) Iterations ------------------------------------------------ BM_UFlat/0 37041 36990 100000 2.6GB/s html BM_UFlat/1 471384 470574 8930 1.4GB/s urls BM_UFlat/2 5997 5986 722354 19.2GB/s jpg BM_UFlat/3 124 123 34964717 1.5GB/s jpg_200 BM_UFlat/4 6850 6838 621414 13.9GB/s pdf BM_UFlat/5 182578 182271 23001 2.1GB/s html4 BM_UFlat/6 148338 147989 28132 980.1MB/s txt1 BM_UFlat/7 130682 130471 32347 915.0MB/s txt2 BM_UFlat/8 397420 396553 10000 1026.3MB/s txt3 BM_UFlat/9 550126 548872 7736 837.2MB/s txt4 BM_UFlat/10 35013 34958 100000 3.2GB/s pb BM_UFlat/11 152270 151889 27508 1.1GB/s gaviota BM_UFlat/12 11117 11096 379059 2.1GB/s cp BM_UFlat/13 5812 5801 725240 1.8GB/s c BM_UFlat/14 1780 1777 2383982 2.0GB/s lsp BM_UFlat/15 707871 706139 5946 1.4GB/s xls BM_UFlat/16 157 157 26889747 1.2GB/s xls_200 BM_UFlat/17 239160 238556 17512 2.0GB/s bin BM_UFlat/18 181 180 23326040 1057.5MB/s bin_200 BM_UFlat/19 22706 22656 186285 1.6GB/s sum BM_UFlat/20 2319 2315 1813186 1.7GB/s man BM_UFlatSink/0 42657 42574 99000 2.2GB/s html BM_UFlatSink/1 466316 465262 9036 1.4GB/s urls BM_UFlatSink/2 6873 6859 648525 16.7GB/s jpg BM_UFlatSink/3 124 124 34434643 1.5GB/s jpg_200 BM_UFlatSink/4 6804 6790 624282 14.0GB/s pdf BM_UFlatSink/5 185468 185062 22746 2.1GB/s html4 BM_UFlatSink/6 148511 148209 28284 978.6MB/s txt1 BM_UFlatSink/7 130865 130607 32144 914.0MB/s txt2 BM_UFlatSink/8 393931 392983 10000 1035.6MB/s txt3 BM_UFlatSink/9 545548 544275 7740 844.3MB/s txt4 BM_UFlatSink/10 41659 41584 100000 2.7GB/s pb BM_UFlatSink/11 152062 151721 27854 1.1GB/s gaviota BM_UFlatSink/12 11987 11968 350909 1.9GB/s cp BM_UFlatSink/13 5652 5641 743280 1.8GB/s c BM_UFlatSink/14 1728 1725 2446140 2.0GB/s lsp BM_UFlatSink/15 687879 686231 6138 1.4GB/s xls BM_UFlatSink/16 155 155 27254484 1.2GB/s xls_200 BM_UFlatSink/17 240689 240083 17450 2.0GB/s bin BM_UFlatSink/18 183 182 22932858 1046.8MB/s bin_200 BM_UFlatSink/19 22718 22674 185207 1.6GB/s sum BM_UFlatSink/20 2272 2268 1851664 1.7GB/s man |
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ckennelly
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e788e527d3 |
Avoid calling memset when resizing the buffer.
This buffer will be initialized and then trimmed down to size during the compression phase. |
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Steinar H. Gunderson
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32d6d7d8a2 |
Merge pull request #6 from deviance/provide-pkg-config-data
Provide pkg-config data |
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Peter Kasting
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971613510f |
Add #ifdef to guard against macro redefinition if this is included in another
Google project that also defines this. |
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Steinar H. Gunderson
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0000f997dd |
Merge pull request #13 from huachaohuang/patch-1
Allow to compile in nested packages. |
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Steinar H. Gunderson
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d53de18799 |
Make heuristic match skipping more aggressive.
This causes compression to be much faster on incompressible inputs (such as the jpeg and pdf tests), and is neutral or even positive on the other tests. The test set shows only microscopic density regressions; I attempted to construct a worst-case test set containing ~1500 different cases of mixed plaintext + /dev/urandom, and even those seemed to be only 0.38 percentage points less dense on average (the single worst case was 87.8% -> 89.0%), which we can live with given that this is already an edge case. The original idea is by Klaus Post; I only tweaked the implementation. Ironically, the new implementation is almost more in line with the comment that was there, so I've left that largely alone, albeit with a small modification. Microbenchmark results (opt mode, 64-bit, static linking): Ivy Bridge: Benchmark Base (ns) New (ns) Improvement ---------------------------------------------------------------------------------------- BM_ZFlat/0 120284 115480 847.0MB/s html (22.31 %) +4.2% BM_ZFlat/1 1527911 1522242 440.7MB/s urls (47.78 %) +0.4% BM_ZFlat/2 17591 10582 10.9GB/s jpg (99.95 %) +66.2% BM_ZFlat/3 323 322 593.3MB/s jpg_200 (73.00 %) +0.3% BM_ZFlat/4 53691 14063 6.8GB/s pdf (83.30 %) +281.8% BM_ZFlat/5 495442 492347 794.8MB/s html4 (22.52 %) +0.6% BM_ZFlat/6 473523 473622 306.7MB/s txt1 (57.88 %) -0.0% BM_ZFlat/7 421406 420120 284.5MB/s txt2 (61.91 %) +0.3% BM_ZFlat/8 1265632 1270538 320.8MB/s txt3 (54.99 %) -0.4% BM_ZFlat/9 1742688 1737894 264.8MB/s txt4 (66.26 %) +0.3% BM_ZFlat/10 107950 103404 1095.1MB/s pb (19.68 %) +4.4% BM_ZFlat/11 372660 371818 473.5MB/s gaviota (37.72 %) +0.2% BM_ZFlat/12 53239 49528 474.4MB/s cp (48.12 %) +7.5% BM_ZFlat/13 18940 17349 613.9MB/s c (42.47 %) +9.2% BM_ZFlat/14 5155 5075 700.3MB/s lsp (48.37 %) +1.6% BM_ZFlat/15 1474757 1474471 667.2MB/s xls (41.23 %) +0.0% BM_ZFlat/16 363 362 528.0MB/s xls_200 (78.00 %) +0.3% BM_ZFlat/17 453849 456931 1073.2MB/s bin (18.11 %) -0.7% BM_ZFlat/18 90 87 2.1GB/s bin_200 (7.50 %) +3.4% BM_ZFlat/19 82163 80498 453.7MB/s sum (48.96 %) +2.1% BM_ZFlat/20 7174 7124 566.7MB/s man (59.21 %) +0.7% Sum of all benchmarks 8694831 8623857 +0.8% Sandy Bridge: Benchmark Base (ns) New (ns) Improvement ---------------------------------------------------------------------------------------- BM_ZFlat/0 117426 112649 868.2MB/s html (22.31 %) +4.2% BM_ZFlat/1 1517095 1498522 447.5MB/s urls (47.78 %) +1.2% BM_ZFlat/2 18601 10649 10.8GB/s jpg (99.95 %) +74.7% BM_ZFlat/3 359 356 536.0MB/s jpg_200 (73.00 %) +0.8% BM_ZFlat/4 60249 13832 6.9GB/s pdf (83.30 %) +335.6% BM_ZFlat/5 481246 475571 822.7MB/s html4 (22.52 %) +1.2% BM_ZFlat/6 460541 455693 318.8MB/s txt1 (57.88 %) +1.1% BM_ZFlat/7 407751 404147 295.8MB/s txt2 (61.91 %) +0.9% BM_ZFlat/8 1228255 1222519 333.4MB/s txt3 (54.99 %) +0.5% BM_ZFlat/9 1678299 1666379 276.2MB/s txt4 (66.26 %) +0.7% BM_ZFlat/10 106499 101715 1113.4MB/s pb (19.68 %) +4.7% BM_ZFlat/11 361913 360222 488.7MB/s gaviota (37.72 %) +0.5% BM_ZFlat/12 53137 49618 473.6MB/s cp (48.12 %) +7.1% BM_ZFlat/13 18801 17812 597.8MB/s c (42.47 %) +5.6% BM_ZFlat/14 5394 5383 660.2MB/s lsp (48.37 %) +0.2% BM_ZFlat/15 1435411 1432870 686.4MB/s xls (41.23 %) +0.2% BM_ZFlat/16 389 395 483.3MB/s xls_200 (78.00 %) -1.5% BM_ZFlat/17 447255 445510 1100.4MB/s bin (18.11 %) +0.4% BM_ZFlat/18 86 86 2.2GB/s bin_200 (7.50 %) +0.0% BM_ZFlat/19 82555 79512 459.3MB/s sum (48.96 %) +3.8% BM_ZFlat/20 7527 7553 534.5MB/s man (59.21 %) -0.3% Sum of all benchmarks 8488789 8360993 +1.5% Haswell: Benchmark Base (ns) New (ns) Improvement ---------------------------------------------------------------------------------------- BM_ZFlat/0 107512 105621 925.6MB/s html (22.31 %) +1.8% BM_ZFlat/1 1344306 1332479 503.1MB/s urls (47.78 %) +0.9% BM_ZFlat/2 14752 9471 12.1GB/s jpg (99.95 %) +55.8% BM_ZFlat/3 287 275 694.0MB/s jpg_200 (73.00 %) +4.4% BM_ZFlat/4 48810 12263 7.8GB/s pdf (83.30 %) +298.0% BM_ZFlat/5 443013 442064 884.6MB/s html4 (22.52 %) +0.2% BM_ZFlat/6 429239 432124 336.0MB/s txt1 (57.88 %) -0.7% BM_ZFlat/7 381765 383681 311.5MB/s txt2 (61.91 %) -0.5% BM_ZFlat/8 1136667 1154304 353.0MB/s txt3 (54.99 %) -1.5% BM_ZFlat/9 1579925 1592431 288.9MB/s txt4 (66.26 %) -0.8% BM_ZFlat/10 98345 92411 1.2GB/s pb (19.68 %) +6.4% BM_ZFlat/11 340397 340466 516.8MB/s gaviota (37.72 %) -0.0% BM_ZFlat/12 47076 43536 539.5MB/s cp (48.12 %) +8.1% BM_ZFlat/13 16680 15637 680.8MB/s c (42.47 %) +6.7% BM_ZFlat/14 4616 4539 782.6MB/s lsp (48.37 %) +1.7% BM_ZFlat/15 1331231 1334094 736.9MB/s xls (41.23 %) -0.2% BM_ZFlat/16 326 322 593.5MB/s xls_200 (78.00 %) +1.2% BM_ZFlat/17 404383 400326 1.2GB/s bin (18.11 %) +1.0% BM_ZFlat/18 69 69 2.7GB/s bin_200 (7.50 %) +0.0% BM_ZFlat/19 74771 71348 511.7MB/s sum (48.96 %) +4.8% BM_ZFlat/20 6461 6383 632.2MB/s man (59.21 %) +1.2% Sum of all benchmarks 7810631 7773844 +0.5% I've done a quick test that there are no performance regressions on external GCC (4.9.2, Debian, Haswell, 64-bit), too. |
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Steinar H. Gunderson
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2b9152d9c5 |
Default to glibtoolize instead of libtoolize if it exists,
and also make it customizable through the environment variable $LIBTOOLIZE. Fixes autogen.sh issues on OS X, which ships its own (incompatible) libtoolize. R=jeff |
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Steinar H. Gunderson
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0800b1e4c7 |
Work around an issue where some compilers interpret <:: as a trigraph.
Also correct the namespace name. |
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Steinar H. Gunderson
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e7d2818d1e |
Unbreak the open-source build for ARM due to missing ATTRIBUTE_PACKED
declaration. |
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Steinar H. Gunderson
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7525a1600d |
Fix an issue where the ByteSource path (used for parsing std::string)
would incorrectly accept some invalid varints that the other path would not, causing potential CHECK-failures if the unit test were run with --write_uncompressed and a corrupted input file. Found by the afl fuzzer. |
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Steinar H. Gunderson
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ef5598aa0e |
Make UNALIGNED_LOAD16/32 on ARMv7 go through an explicitly unaligned struct,
to avoid the compiler coalescing multiple loads into a single load instruction (which only work for aligned accesses). A typical example where GCC would coalesce: uint8* p = ...; uint32 a = UNALIGNED_LOAD32(p); uint32 b = UNALIGNED_LOAD32(p + 4); uint32 c = a | b; |
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Huachao Huang
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b8cd908a86 | Allow to compile in nested packages. | |
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Steinar H. Gunderson
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96a2e340f3 |
Update URLs in the Snappy README to reflect the move to GitHub.
A=sesse R=sanjay |
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Steinar H. Gunderson
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0852af7606 |
Move the logic from ComputeTable into the unit test, which means it's run
automatically together with the other tests, and also removes the stray function ComputeTable() (which was never referenced by anything else in the open-source version, causing compiler warnings for some) out of the core library. Fixes public issue 96. A=sesse R=sanjay |
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Steinar H. Gunderson
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d80342922c |
Fix signed-vs.-unsigned comparison warnings.
These were found by compiling Chromium's external copy of this code with MSVC with warning C4018 enabled. A=pkasting R=sanjay |
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Aleksandr Makarov
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d2cb73b6ac | Provide pkg-config data | |
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Steinar H. Gunderson
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efb39e81b8 |
Release Snappy 1.1.3; getting the new Uncompress variant in a release is nice,
and it's also good to finally get an official release out after the migration to GitHub. The GitHub releases are basically done by tagging a commit and then uploading the .tar.gz file generated by make dist as a binary asset; GitHub will add all files on the tagged commit on top of the tarball and recompress, but since we don't have any nodist_* files in configure.ac, this works fine for us. (As far as I can see, this behavior of GitHub--uncompressing the .tar.gz, and the behavior of silently ignoring files in it that are also in the git repository--is undocumented, but also seems to be used in some official screenshots, so I guess we can rely on it.) A=sesse R=jeff |
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Steinar H. Gunderson
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eb66d8176b |
Initialized members of SnappyArrayWriter and SnappyDecompressionValidator.
These members were almost surely initialized before use by other member functions, but Coverity was warning about this. Eliminating these warnings minimizes clutter in that report and the likelihood of overlooking a real bug. A=cmumford R=jeff |
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Steinar H. Gunderson
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b2312c4c25 |
Add support for Uncompress(source, sink). Various changes to allow
Uncompress(source, sink) to get the same performance as the different variants of Uncompress to Cord/DataBuffer/String/FlatBuffer. Changes to efficiently support Uncompress(source, sink) -------- a) For strings - we add support to StringByteSink to do GetAppendBuffer so we can write to it without copying. b) For flat array buffers, we do GetAppendBuffer and see if we can get a full buffer. With the above changes we get performance with ByteSource/ByteSink that is very close to directly using flat arrays and strings. We add various benchmark cases to demonstrate that. Orthogonal change ------------------ Add support for TryFastAppend() for SnappyScatteredWriter. Benchmark results are below CPU: Intel Core2 dL1:32KB dL2:4096KB Benchmark Time(ns) CPU(ns) Iterations ----------------------------------------------------- BM_UFlat/0 109065 108996 6410 896.0MB/s html BM_UFlat/1 1012175 1012343 691 661.4MB/s urls BM_UFlat/2 26775 26771 26149 4.4GB/s jpg BM_UFlat/3 48947 48940 14363 1.8GB/s pdf BM_UFlat/4 441029 440835 1589 886.1MB/s html4 BM_UFlat/5 39861 39880 17823 588.3MB/s cp BM_UFlat/6 18315 18300 38126 581.1MB/s c BM_UFlat/7 5254 5254 100000 675.4MB/s lsp BM_UFlat/8 1568060 1567376 447 626.6MB/s xls BM_UFlat/9 337512 337734 2073 429.5MB/s txt1 BM_UFlat/10 287269 287054 2434 415.9MB/s txt2 BM_UFlat/11 890098 890219 787 457.2MB/s txt3 BM_UFlat/12 1186593 1186863 590 387.2MB/s txt4 BM_UFlat/13 573927 573318 1000 853.7MB/s bin BM_UFlat/14 64250 64294 10000 567.2MB/s sum BM_UFlat/15 7301 7300 96153 552.2MB/s man BM_UFlat/16 109617 109636 6375 1031.5MB/s pb BM_UFlat/17 364438 364497 1921 482.3MB/s gaviota BM_UFlatSink/0 108518 108465 6450 900.4MB/s html BM_UFlatSink/1 991952 991997 705 675.0MB/s urls BM_UFlatSink/2 26815 26798 26065 4.4GB/s jpg BM_UFlatSink/3 49127 49122 14255 1.8GB/s pdf BM_UFlatSink/4 436674 436731 1604 894.4MB/s html4 BM_UFlatSink/5 39738 39733 17345 590.5MB/s cp BM_UFlatSink/6 18413 18416 37962 577.4MB/s c BM_UFlatSink/7 5677 5676 100000 625.2MB/s lsp BM_UFlatSink/8 1552175 1551026 451 633.2MB/s xls BM_UFlatSink/9 338526 338489 2065 428.5MB/s txt1 BM_UFlatSink/10 289387 289307 2420 412.6MB/s txt2 BM_UFlatSink/11 893803 893706 783 455.4MB/s txt3 BM_UFlatSink/12 1195919 1195459 586 384.4MB/s txt4 BM_UFlatSink/13 559637 559779 1000 874.3MB/s bin BM_UFlatSink/14 65073 65094 10000 560.2MB/s sum BM_UFlatSink/15 7618 7614 92823 529.5MB/s man BM_UFlatSink/16 110085 110121 6352 1027.0MB/s pb BM_UFlatSink/17 369196 368915 1896 476.5MB/s gaviota BM_UValidate/0 46954 46957 14899 2.0GB/s html BM_UValidate/1 500621 500868 1000 1.3GB/s urls BM_UValidate/2 283 283 2481447 417.2GB/s jpg BM_UValidate/3 16230 16228 43137 5.4GB/s pdf BM_UValidate/4 189129 189193 3701 2.0GB/s html4 A=uday R=sanjay |
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Steinar H. Gunderson
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b2ad960067 |
Changes to eliminate compiler warnings on MSVC
This code was not compiling under Visual Studio 2013 with warnings being treated as errors. Specifically: 1. Changed int -> size_t to eliminate signed/unsigned mismatch warning. 2. Added some missing return values to functions. 3. Inserting character instead of integer literals into strings to avoid type conversions. A=cmumford R=jeff |
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Steinar H. Gunderson
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e7a897e187 |
Fixed unit tests to compile under MSVC.
1. Including config.h in test. 2. Including windows.h before zippy-test.h. 3. Removed definition of WIN32_LEAN_AND_MEAN. This caused problems in build environments that define WIN32_LEAN_AND_MEAN as our definition didn't check for prior existence. This constant is old and no longer needed anyhow. 4. Disable MSVC warning 4722 since ~LogMessageCrash() never returns. A=cmumford R=jeff |
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Steinar H. Gunderson
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86eb8b152b |
Change a few branch annotations that profiling found to be wrong.
Overall performance is neutral or slightly positive. Westmere (64-bit, opt): Benchmark Base (ns) New (ns) Improvement -------------------------------------------------------------------------------------- BM_UFlat/0 73798 71464 1.3GB/s html +3.3% BM_UFlat/1 715223 704318 953.5MB/s urls +1.5% BM_UFlat/2 8137 8871 13.0GB/s jpg -8.3% BM_UFlat/3 200 204 935.5MB/s jpg_200 -2.0% BM_UFlat/4 21627 21281 4.5GB/s pdf +1.6% BM_UFlat/5 302806 290350 1.3GB/s html4 +4.3% BM_UFlat/6 218920 219017 664.1MB/s txt1 -0.0% BM_UFlat/7 190437 191212 626.1MB/s txt2 -0.4% BM_UFlat/8 584192 580484 703.4MB/s txt3 +0.6% BM_UFlat/9 776537 779055 591.6MB/s txt4 -0.3% BM_UFlat/10 76056 72606 1.5GB/s pb +4.8% BM_UFlat/11 235962 239043 737.4MB/s gaviota -1.3% BM_UFlat/12 28049 28000 840.1MB/s cp +0.2% BM_UFlat/13 12225 12021 886.9MB/s c +1.7% BM_UFlat/14 3362 3544 1004.0MB/s lsp -5.1% BM_UFlat/15 937015 939206 1048.9MB/s xls -0.2% BM_UFlat/16 236 233 823.1MB/s xls_200 +1.3% BM_UFlat/17 373170 361947 1.3GB/s bin +3.1% BM_UFlat/18 264 264 725.5MB/s bin_200 +0.0% BM_UFlat/19 42834 43577 839.2MB/s sum -1.7% BM_UFlat/20 4770 4736 853.6MB/s man +0.7% BM_UValidate/0 39671 39944 2.4GB/s html -0.7% BM_UValidate/1 443391 443391 1.5GB/s urls +0.0% BM_UValidate/2 163 163 703.3GB/s jpg +0.0% BM_UValidate/3 113 112 1.7GB/s jpg_200 +0.9% BM_UValidate/4 7555 7608 12.6GB/s pdf -0.7% BM_ZFlat/0 157616 157568 621.5MB/s html (22.31 %) +0.0% BM_ZFlat/1 1997290 2014486 333.4MB/s urls (47.77 %) -0.9% BM_ZFlat/2 23035 22237 5.2GB/s jpg (99.95 %) +3.6% BM_ZFlat/3 539 540 354.5MB/s jpg_200 (73.00 %) -0.2% BM_ZFlat/4 80709 81369 1.2GB/s pdf (81.85 %) -0.8% BM_ZFlat/5 639059 639220 613.0MB/s html4 (22.51 %) -0.0% BM_ZFlat/6 577203 583370 249.3MB/s txt1 (57.87 %) -1.1% BM_ZFlat/7 510887 516094 232.0MB/s txt2 (61.93 %) -1.0% BM_ZFlat/8 1535843 1556973 262.2MB/s txt3 (54.92 %) -1.4% BM_ZFlat/9 2070068 2102380 219.3MB/s txt4 (66.22 %) -1.5% BM_ZFlat/10 152396 152148 745.5MB/s pb (19.64 %) +0.2% BM_ZFlat/11 447367 445859 395.4MB/s gaviota (37.72 %) +0.3% BM_ZFlat/12 76375 76797 306.3MB/s cp (48.12 %) -0.5% BM_ZFlat/13 31518 31987 333.3MB/s c (42.40 %) -1.5% BM_ZFlat/14 10598 10827 328.6MB/s lsp (48.37 %) -2.1% BM_ZFlat/15 1782243 1802728 546.5MB/s xls (41.23 %) -1.1% BM_ZFlat/16 526 539 355.0MB/s xls_200 (78.00 %) -2.4% BM_ZFlat/17 598141 597311 822.1MB/s bin (18.11 %) +0.1% BM_ZFlat/18 121 120 1.6GB/s bin_200 (7.50 %) +0.8% BM_ZFlat/19 109981 112173 326.0MB/s sum (48.96 %) -2.0% BM_ZFlat/20 14355 14575 277.4MB/s man (59.36 %) -1.5% Sum of all benchmarks 33882722 33879325 +0.0% Sandy Bridge (64-bit, opt): Benchmark Base (ns) New (ns) Improvement -------------------------------------------------------------------------------------- BM_UFlat/0 43764 41600 2.3GB/s html +5.2% BM_UFlat/1 517990 507058 1.3GB/s urls +2.2% BM_UFlat/2 6625 5529 20.8GB/s jpg +19.8% BM_UFlat/3 154 155 1.2GB/s jpg_200 -0.6% BM_UFlat/4 12795 11747 8.1GB/s pdf +8.9% BM_UFlat/5 200335 193413 2.0GB/s html4 +3.6% BM_UFlat/6 156574 156426 929.2MB/s txt1 +0.1% BM_UFlat/7 137574 137464 870.4MB/s txt2 +0.1% BM_UFlat/8 422551 421603 967.4MB/s txt3 +0.2% BM_UFlat/9 577749 578985 795.6MB/s txt4 -0.2% BM_UFlat/10 42329 39362 2.8GB/s pb +7.5% BM_UFlat/11 170615 169751 1037.9MB/s gaviota +0.5% BM_UFlat/12 12800 12719 1.8GB/s cp +0.6% BM_UFlat/13 6585 6579 1.6GB/s c +0.1% BM_UFlat/14 2066 2044 1.7GB/s lsp +1.1% BM_UFlat/15 750861 746911 1.3GB/s xls +0.5% BM_UFlat/16 188 192 996.0MB/s xls_200 -2.1% BM_UFlat/17 271622 264333 1.8GB/s bin +2.8% BM_UFlat/18 208 207 923.6MB/s bin_200 +0.5% BM_UFlat/19 24667 24845 1.4GB/s sum -0.7% BM_UFlat/20 2663 2662 1.5GB/s man +0.0% BM_ZFlat/0 115173 115624 846.5MB/s html (22.31 %) -0.4% BM_ZFlat/1 1530331 1537769 436.5MB/s urls (47.77 %) -0.5% BM_ZFlat/2 17503 17013 6.8GB/s jpg (99.95 %) +2.9% BM_ZFlat/3 385 385 496.3MB/s jpg_200 (73.00 %) +0.0% BM_ZFlat/4 61753 61540 1.6GB/s pdf (81.85 %) +0.3% BM_ZFlat/5 484806 483356 810.1MB/s html4 (22.51 %) +0.3% BM_ZFlat/6 464143 467609 310.9MB/s txt1 (57.87 %) -0.7% BM_ZFlat/7 410315 413319 289.5MB/s txt2 (61.93 %) -0.7% BM_ZFlat/8 1244082 1249381 326.5MB/s txt3 (54.92 %) -0.4% BM_ZFlat/9 1696914 1709685 269.4MB/s txt4 (66.22 %) -0.7% BM_ZFlat/10 104148 103372 1096.7MB/s pb (19.64 %) +0.8% BM_ZFlat/11 363522 359722 489.8MB/s gaviota (37.72 %) +1.1% BM_ZFlat/12 47021 50095 469.3MB/s cp (48.12 %) -6.1% BM_ZFlat/13 16888 16985 627.4MB/s c (42.40 %) -0.6% BM_ZFlat/14 5496 5469 650.3MB/s lsp (48.37 %) +0.5% BM_ZFlat/15 1460713 1448760 679.5MB/s xls (41.23 %) +0.8% BM_ZFlat/16 387 393 486.8MB/s xls_200 (78.00 %) -1.5% BM_ZFlat/17 457654 451462 1086.6MB/s bin (18.11 %) +1.4% BM_ZFlat/18 97 87 2.1GB/s bin_200 (7.50 %) +11.5% BM_ZFlat/19 77904 80924 451.7MB/s sum (48.96 %) -3.7% BM_ZFlat/20 7648 7663 527.1MB/s man (59.36 %) -0.2% Sum of all benchmarks 25493635 25482069 +0.0% A=dehao R=sesse |
|
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Steinar H. Gunderson
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11ccdfb868 |
Sync with various Google-internal changes.
Should not mean much for the open-source version. |
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Steinar H. Gunderson
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22acaf438e |
Change some internal path names.
This is mostly to sync up with some changes from Google's internal repositories; it does not affect the open-source distribution in itself. |
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snappy.mirrorbot@gmail.com
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1ff9be9b8f |
Release Snappy 1.1.2.
R=jeff git-svn-id: https://snappy.googlecode.com/svn/trunk@84 03e5f5b5-db94-4691-08a0-1a8bf15f6143 |
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snappy.mirrorbot@gmail.com
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19690d78e8 |
Fix public issue 82: Stop distributing benchmark data files that have
unclear or unsuitable licensing. In general, we replace the files we can with liberally licensed data, and remove all the others (in particular all the parts of the Canterbury corpus that are not clearly in the public domain). The replacements do not always have the exact same characteristics as the original ones, but they are more than good enough to be useful for benchmarking. git-svn-id: https://snappy.googlecode.com/svn/trunk@83 03e5f5b5-db94-4691-08a0-1a8bf15f6143 |
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snappy.mirrorbot@gmail.com
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f82bff66af |
Add support for padding in the Snappy framed format.
This is specifically motivated by DICOM's demands that embedded data must be of an even number of bytes, but could in principle be used for any sort of padding/alignment needed. R=sanjay git-svn-id: https://snappy.googlecode.com/svn/trunk@82 03e5f5b5-db94-4691-08a0-1a8bf15f6143 |
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snappy.mirrorbot@gmail.com
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eeead8dc38 |
Release Snappy 1.1.1.
R=jeff git-svn-id: https://snappy.googlecode.com/svn/trunk@81 03e5f5b5-db94-4691-08a0-1a8bf15f6143 |
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snappy.mirrorbot@gmail.com
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6bc39e24c7 |
Add autoconf tests for size_t and ssize_t. Sort-of resolves public issue 79;
it would solve the problem if MSVC typically used autoconf. However, it gives a natural place (config.h) to put the typedef even for MSVC. R=jsbell git-svn-id: https://snappy.googlecode.com/svn/trunk@80 03e5f5b5-db94-4691-08a0-1a8bf15f6143 |
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snappy.mirrorbot@gmail.com
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7c3c01df77 |
When we compare the number of bytes produced with the offset for a
backreference, make the signedness of the bytes produced clear, by sticking it into a size_t. This avoids a signed/unsigned compare warning from MSVC (public issue 71), and also is slightly clearer. Since the line is now so long the explanatory comment about the -1u trick has to go somewhere else anyway, I used the opportunity to explain it in slightly more detail. This is a purely stylistic change; the emitted assembler from GCC is identical. R=jeff git-svn-id: https://snappy.googlecode.com/svn/trunk@79 03e5f5b5-db94-4691-08a0-1a8bf15f6143 |
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snappy.mirrorbot@gmail.com
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2f0aaf8631 |
In the fast path for decompressing literals, instead of checking
whether there's 16 bytes free and then checking right afterwards (when having subtracted the literal size) that there are now 5 bytes free, just check once for 21 bytes. This skips a compare and a branch; although it is easily predictable, it is still a few cycles on a fast path that we would like to get rid of. Benchmarking this yields very confusing results. On open-source GCC 4.8.1 on Haswell, we get exactly the expected results; the benchmarks where we hit the fast path for literals (in particular the two HTML benchmarks and the protobuf benchmark) give very nice speedups, and the others are not really affected. However, benchmarks with Google's GCC branch on other hardware is much less clear. It seems that we have a weak loss in some cases (and the win for the “typical” win cases are not nearly as clear), but that it depends on microarchitecture and plain luck in how we run the benchmark. Looking at the generated assembler, it seems that the removal of the if causes other large-scale changes in how the function is laid out, which makes it likely that this is just bad luck. Thus, we should keep this change, even though its exact current impact is unclear; it's a sensible change per se, and dropping it on the basis of microoptimization for a given compiler (or even branch of a compiler) would seem like a bad strategy in the long run. Microbenchmark results (all in 64-bit, opt mode): Nehalem, Google GCC: Benchmark Base (ns) New (ns) Improvement ------------------------------------------------------------------------------ BM_UFlat/0 76747 75591 1.3GB/s html +1.5% BM_UFlat/1 765756 757040 886.3MB/s urls +1.2% BM_UFlat/2 10867 10893 10.9GB/s jpg -0.2% BM_UFlat/3 124 131 1.4GB/s jpg_200 -5.3% BM_UFlat/4 31663 31596 2.8GB/s pdf +0.2% BM_UFlat/5 314162 308176 1.2GB/s html4 +1.9% BM_UFlat/6 29668 29746 790.6MB/s cp -0.3% BM_UFlat/7 12958 13386 796.4MB/s c -3.2% BM_UFlat/8 3596 3682 966.0MB/s lsp -2.3% BM_UFlat/9 1019193 1033493 953.3MB/s xls -1.4% BM_UFlat/10 239 247 775.3MB/s xls_200 -3.2% BM_UFlat/11 236411 240271 606.9MB/s txt1 -1.6% BM_UFlat/12 206639 209768 571.2MB/s txt2 -1.5% BM_UFlat/13 627803 635722 641.4MB/s txt3 -1.2% BM_UFlat/14 845932 857816 538.2MB/s txt4 -1.4% BM_UFlat/15 402107 391670 1.2GB/s bin +2.7% BM_UFlat/16 283 279 683.6MB/s bin_200 +1.4% BM_UFlat/17 46070 46815 781.5MB/s sum -1.6% BM_UFlat/18 5053 5163 782.0MB/s man -2.1% BM_UFlat/19 79721 76581 1.4GB/s pb +4.1% BM_UFlat/20 251158 252330 697.5MB/s gaviota -0.5% Sum of all benchmarks 4966150 4980396 -0.3% Sandy Bridge, Google GCC: Benchmark Base (ns) New (ns) Improvement ------------------------------------------------------------------------------ BM_UFlat/0 42850 42182 2.3GB/s html +1.6% BM_UFlat/1 525660 515816 1.3GB/s urls +1.9% BM_UFlat/2 7173 7283 16.3GB/s jpg -1.5% BM_UFlat/3 92 91 2.1GB/s jpg_200 +1.1% BM_UFlat/4 15147 14872 5.9GB/s pdf +1.8% BM_UFlat/5 199936 192116 2.0GB/s html4 +4.1% BM_UFlat/6 12796 12443 1.8GB/s cp +2.8% BM_UFlat/7 6588 6400 1.6GB/s c +2.9% BM_UFlat/8 2010 1951 1.8GB/s lsp +3.0% BM_UFlat/9 761124 763049 1.3GB/s xls -0.3% BM_UFlat/10 186 189 1016.1MB/s xls_200 -1.6% BM_UFlat/11 159354 158460 918.6MB/s txt1 +0.6% BM_UFlat/12 139732 139950 856.1MB/s txt2 -0.2% BM_UFlat/13 429917 425027 961.7MB/s txt3 +1.2% BM_UFlat/14 585255 587324 785.8MB/s txt4 -0.4% BM_UFlat/15 276186 266173 1.8GB/s bin +3.8% BM_UFlat/16 205 207 925.5MB/s bin_200 -1.0% BM_UFlat/17 24925 24935 1.4GB/s sum -0.0% BM_UFlat/18 2632 2576 1.5GB/s man +2.2% BM_UFlat/19 40546 39108 2.8GB/s pb +3.7% BM_UFlat/20 175803 168209 1048.9MB/s gaviota +4.5% Sum of all benchmarks 3408117 3368361 +1.2% Haswell, upstream GCC 4.8.1: Benchmark Base (ns) New (ns) Improvement ------------------------------------------------------------------------------ BM_UFlat/0 46308 40641 2.3GB/s html +13.9% BM_UFlat/1 513385 514706 1.3GB/s urls -0.3% BM_UFlat/2 6197 6151 19.2GB/s jpg +0.7% BM_UFlat/3 61 61 3.0GB/s jpg_200 +0.0% BM_UFlat/4 13551 13429 6.5GB/s pdf +0.9% BM_UFlat/5 198317 190243 2.0GB/s html4 +4.2% BM_UFlat/6 14768 12560 1.8GB/s cp +17.6% BM_UFlat/7 6453 6447 1.6GB/s c +0.1% BM_UFlat/8 1991 1980 1.8GB/s lsp +0.6% BM_UFlat/9 766947 770424 1.2GB/s xls -0.5% BM_UFlat/10 170 169 1.1GB/s xls_200 +0.6% BM_UFlat/11 164350 163554 888.7MB/s txt1 +0.5% BM_UFlat/12 145444 143830 832.1MB/s txt2 +1.1% BM_UFlat/13 437849 438413 929.2MB/s txt3 -0.1% BM_UFlat/14 603587 605309 759.8MB/s txt4 -0.3% BM_UFlat/15 249799 248067 1.9GB/s bin +0.7% BM_UFlat/16 191 188 1011.4MB/s bin_200 +1.6% BM_UFlat/17 26064 24778 1.4GB/s sum +5.2% BM_UFlat/18 2620 2601 1.5GB/s man +0.7% BM_UFlat/19 44551 37373 3.0GB/s pb +19.2% BM_UFlat/20 165408 164584 1.0GB/s gaviota +0.5% Sum of all benchmarks 3408011 3385508 +0.7% git-svn-id: https://snappy.googlecode.com/svn/trunk@78 03e5f5b5-db94-4691-08a0-1a8bf15f6143 |
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snappy.mirrorbot@gmail.com
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062bf544a6 |
Make the two IncrementalCopy* functions take in an ssize_t instead of a len,
in order to avoid having to do 32-to-64-bit signed conversions on a hot path during decompression. (Also fixes some MSVC warnings, mentioned in public issue 75, but more of those remain.) They cannot be size_t because we expect them to go negative and test for that. This saves a few movzwl instructions, yielding ~2% speedup in decompression. Sandy Bridge: Benchmark Base (ns) New (ns) Improvement ------------------------------------------------------------------------------------------------- BM_UFlat/0 48009 41283 2.3GB/s html +16.3% BM_UFlat/1 531274 513419 1.3GB/s urls +3.5% BM_UFlat/2 7378 7062 16.8GB/s jpg +4.5% BM_UFlat/3 92 92 2.0GB/s jpg_200 +0.0% BM_UFlat/4 15057 14974 5.9GB/s pdf +0.6% BM_UFlat/5 204323 193140 2.0GB/s html4 +5.8% BM_UFlat/6 13282 12611 1.8GB/s cp +5.3% BM_UFlat/7 6511 6504 1.6GB/s c +0.1% BM_UFlat/8 2014 2030 1.7GB/s lsp -0.8% BM_UFlat/9 775909 768336 1.3GB/s xls +1.0% BM_UFlat/10 182 184 1043.2MB/s xls_200 -1.1% BM_UFlat/11 167352 161630 901.2MB/s txt1 +3.5% BM_UFlat/12 147393 142246 842.8MB/s txt2 +3.6% BM_UFlat/13 449960 432853 944.4MB/s txt3 +4.0% BM_UFlat/14 620497 594845 775.9MB/s txt4 +4.3% BM_UFlat/15 265610 267356 1.8GB/s bin -0.7% BM_UFlat/16 206 205 932.7MB/s bin_200 +0.5% BM_UFlat/17 25561 24730 1.4GB/s sum +3.4% BM_UFlat/18 2620 2644 1.5GB/s man -0.9% BM_UFlat/19 45766 38589 2.9GB/s pb +18.6% BM_UFlat/20 171107 169832 1039.5MB/s gaviota +0.8% Sum of all benchmarks 3500103 3394565 +3.1% Westmere: Benchmark Base (ns) New (ns) Improvement ------------------------------------------------------------------------------------------------- BM_UFlat/0 72624 71526 1.3GB/s html +1.5% BM_UFlat/1 735821 722917 930.8MB/s urls +1.8% BM_UFlat/2 10450 10172 11.7GB/s jpg +2.7% BM_UFlat/3 117 117 1.6GB/s jpg_200 +0.0% BM_UFlat/4 29817 29648 3.0GB/s pdf +0.6% BM_UFlat/5 297126 293073 1.3GB/s html4 +1.4% BM_UFlat/6 28252 27994 842.0MB/s cp +0.9% BM_UFlat/7 12672 12391 862.1MB/s c +2.3% BM_UFlat/8 3507 3425 1040.9MB/s lsp +2.4% BM_UFlat/9 1004268 969395 1018.0MB/s xls +3.6% BM_UFlat/10 233 227 844.8MB/s xls_200 +2.6% BM_UFlat/11 230054 224981 647.8MB/s txt1 +2.3% BM_UFlat/12 201229 196447 610.5MB/s txt2 +2.4% BM_UFlat/13 609547 596761 685.3MB/s txt3 +2.1% BM_UFlat/14 824362 804821 573.8MB/s txt4 +2.4% BM_UFlat/15 371095 374899 1.3GB/s bin -1.0% BM_UFlat/16 267 267 717.8MB/s bin_200 +0.0% BM_UFlat/17 44623 43828 835.9MB/s sum +1.8% BM_UFlat/18 5077 4815 841.0MB/s man +5.4% BM_UFlat/19 74964 73210 1.5GB/s pb +2.4% BM_UFlat/20 237987 236745 746.0MB/s gaviota +0.5% Sum of all benchmarks 4794092 4697659 +2.1% Istanbul: Benchmark Base (ns) New (ns) Improvement ------------------------------------------------------------------------------------------------- BM_UFlat/0 98614 96376 1020.4MB/s html +2.3% BM_UFlat/1 963740 953241 707.2MB/s urls +1.1% BM_UFlat/2 25042 24769 4.8GB/s jpg +1.1% BM_UFlat/3 180 180 1065.6MB/s jpg_200 +0.0% BM_UFlat/4 45942 45403 1.9GB/s pdf +1.2% BM_UFlat/5 400135 390226 1008.2MB/s html4 +2.5% BM_UFlat/6 37768 37392 631.9MB/s cp +1.0% BM_UFlat/7 18585 18200 588.2MB/s c +2.1% BM_UFlat/8 5751 5690 627.7MB/s lsp +1.1% BM_UFlat/9 1543154 1542209 641.4MB/s xls +0.1% BM_UFlat/10 381 388 494.6MB/s xls_200 -1.8% BM_UFlat/11 339715 331973 440.1MB/s txt1 +2.3% BM_UFlat/12 294807 289418 415.4MB/s txt2 +1.9% BM_UFlat/13 906160 884094 463.3MB/s txt3 +2.5% BM_UFlat/14 1224221 1198435 386.1MB/s txt4 +2.2% BM_UFlat/15 516277 502923 979.5MB/s bin +2.7% BM_UFlat/16 405 402 477.2MB/s bin_200 +0.7% BM_UFlat/17 61640 60621 605.6MB/s sum +1.7% BM_UFlat/18 7326 7383 549.5MB/s man -0.8% BM_UFlat/19 94720 92653 1.2GB/s pb +2.2% BM_UFlat/20 360435 346687 510.6MB/s gaviota +4.0% Sum of all benchmarks 6944998 6828663 +1.7% git-svn-id: https://snappy.googlecode.com/svn/trunk@77 03e5f5b5-db94-4691-08a0-1a8bf15f6143 |
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snappy.mirrorbot@gmail.com
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328aafa198 |
Add support for uncompressing to iovecs (scatter I/O).
Windows does not have struct iovec defined anywhere, so we define our own version that's equal to what UNIX typically has. The bulk of this patch was contributed by Mohit Aron. R=jeff git-svn-id: https://snappy.googlecode.com/svn/trunk@76 03e5f5b5-db94-4691-08a0-1a8bf15f6143 |
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snappy.mirrorbot@gmail.com
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cd92eb0852 |
Some code reorganization needed for an internal change.
R=fikes git-svn-id: https://snappy.googlecode.com/svn/trunk@75 03e5f5b5-db94-4691-08a0-1a8bf15f6143 |
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snappy.mirrorbot@gmail.com
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a3e928d62b |
Supports truncated test data in zippy benchmark.
R=sesse git-svn-id: https://snappy.googlecode.com/svn/trunk@74 03e5f5b5-db94-4691-08a0-1a8bf15f6143 |
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snappy.mirrorbot@gmail.com
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bde324c016 |
Release Snappy 1.1.0.
R=sanjay git-svn-id: https://snappy.googlecode.com/svn/trunk@73 03e5f5b5-db94-4691-08a0-1a8bf15f6143 |
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snappy.mirrorbot@gmail.com
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8168446c7e |
Make ./snappy_unittest pass without "srcdir" being defined.
Previously, snappy_unittests would read from an absolute path /testdata/..; convert it to use a relative path instead. Patch from Marc-Antonie Ruel. R=maruel git-svn-id: https://snappy.googlecode.com/svn/trunk@72 03e5f5b5-db94-4691-08a0-1a8bf15f6143 |
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snappy.mirrorbot@gmail.com
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27a0cc3949 |
Increase the Zippy block size from 32 kB to 64 kB, winning ~3% density
while being effectively performance neutral. The longer story about density is that we win 3-6% density on the benchmarks where this has any effect at all; many of the benchmarks (cp, c, lsp, man) are smaller than 32 kB and thus will have no effect. Binary data also seems to win little or nothing; of course, the already-compressed data wins nothing. The protobuf benchmark wins as much as ~18% depending on architecture, but I wouldn't be too sure that this is representative of protobuf data in general. As of performance, we lose a tiny amount since we get more tags (e.g., a long literal might be broken up into literal-copy-literal), but we win it back with less clearing of the hash table, and more opportunities to skip incompressible data (e.g. in the jpg benchmark). Decompression seems to get ever so slightly slower, again due to more tags. The total net change is about as close to zero as we can get, so the end effect seems to be simply more density and no real performance change. The comment about not changing kBlockSize, scary as it is, is not really relevant, since we're never going to have a block-level decompressor without explicitly marked blocks. Replace it with something more appropriate. This affects the framing format, but it's okay to change it since it basically has no users yet. Density (note that cp, c, lsp and man are all smaller than 32 kB): Benchmark Description Base (%) New (%) Improvement -------------------------------------------------------------- ZFlat/0 html 22.57 22.31 +5.6% ZFlat/1 urls 50.89 47.77 +6.5% ZFlat/2 jpg 99.88 99.87 +0.0% ZFlat/3 pdf 82.13 82.07 +0.1% ZFlat/4 html4 23.55 22.51 +4.6% ZFlat/5 cp 48.12 48.12 +0.0% ZFlat/6 c 42.40 42.40 +0.0% ZFlat/7 lsp 48.37 48.37 +0.0% ZFlat/8 xls 41.34 41.23 +0.3% ZFlat/9 txt1 59.81 57.87 +3.4% ZFlat/10 txt2 64.07 61.93 +3.5% ZFlat/11 txt3 57.11 54.92 +4.0% ZFlat/12 txt4 68.35 66.22 +3.2% ZFlat/13 bin 18.21 18.11 +0.6% ZFlat/14 sum 51.88 48.96 +6.0% ZFlat/15 man 59.36 59.36 +0.0% ZFlat/16 pb 23.15 19.64 +17.9% ZFlat/17 gaviota 38.27 37.72 +1.5% Geometric mean 45.51 44.15 +3.1% Microbenchmarks (64-bit, opt): Westmere 2.8 GHz: Benchmark Base (ns) New (ns) Improvement ------------------------------------------------------------------------------------------------- BM_UFlat/0 75342 75027 1.3GB/s html +0.4% BM_UFlat/1 723767 744269 899.6MB/s urls -2.8% BM_UFlat/2 10072 10072 11.7GB/s jpg +0.0% BM_UFlat/3 30747 30388 2.9GB/s pdf +1.2% BM_UFlat/4 307353 306063 1.2GB/s html4 +0.4% BM_UFlat/5 28593 28743 816.3MB/s cp -0.5% BM_UFlat/6 12958 12998 818.1MB/s c -0.3% BM_UFlat/7 3700 3792 935.8MB/s lsp -2.4% BM_UFlat/8 999685 999905 982.1MB/s xls -0.0% BM_UFlat/9 232954 230079 630.4MB/s txt1 +1.2% BM_UFlat/10 200785 201468 592.6MB/s txt2 -0.3% BM_UFlat/11 617267 610968 666.1MB/s txt3 +1.0% BM_UFlat/12 821595 822475 558.7MB/s txt4 -0.1% BM_UFlat/13 377097 377632 1.3GB/s bin -0.1% BM_UFlat/14 45476 45260 805.8MB/s sum +0.5% BM_UFlat/15 4985 5003 805.7MB/s man -0.4% BM_UFlat/16 80813 77494 1.4GB/s pb +4.3% BM_UFlat/17 251792 241553 727.7MB/s gaviota +4.2% BM_UValidate/0 40343 40354 2.4GB/s html -0.0% BM_UValidate/1 426890 451574 1.4GB/s urls -5.5% BM_UValidate/2 187 179 661.9GB/s jpg +4.5% BM_UValidate/3 13783 13827 6.4GB/s pdf -0.3% BM_UValidate/4 162393 163335 2.3GB/s html4 -0.6% BM_UDataBuffer/0 93756 93302 1046.7MB/s html +0.5% BM_UDataBuffer/1 886714 916292 730.7MB/s urls -3.2% BM_UDataBuffer/2 15861 16401 7.2GB/s jpg -3.3% BM_UDataBuffer/3 38934 39224 2.2GB/s pdf -0.7% BM_UDataBuffer/4 381008 379428 1029.5MB/s html4 +0.4% BM_UCord/0 92528 91098 1072.0MB/s html +1.6% BM_UCord/1 858421 885287 756.3MB/s urls -3.0% BM_UCord/2 13140 13464 8.8GB/s jpg -2.4% BM_UCord/3 39012 37773 2.3GB/s pdf +3.3% BM_UCord/4 376869 371267 1052.1MB/s html4 +1.5% BM_UCordString/0 75810 75303 1.3GB/s html +0.7% BM_UCordString/1 735290 753841 888.2MB/s urls -2.5% BM_UCordString/2 11945 13113 9.0GB/s jpg -8.9% BM_UCordString/3 33901 32562 2.7GB/s pdf +4.1% BM_UCordString/4 310985 309390 1.2GB/s html4 +0.5% BM_UCordValidate/0 40952 40450 2.4GB/s html +1.2% BM_UCordValidate/1 433842 456531 1.4GB/s urls -5.0% BM_UCordValidate/2 1179 1173 100.8GB/s jpg +0.5% BM_UCordValidate/3 14481 14392 6.1GB/s pdf +0.6% BM_UCordValidate/4 164364 164151 2.3GB/s html4 +0.1% BM_ZFlat/0 160610 156601 623.6MB/s html (22.31 %) +2.6% BM_ZFlat/1 1995238 1993582 335.9MB/s urls (47.77 %) +0.1% BM_ZFlat/2 30133 24983 4.7GB/s jpg (99.87 %) +20.6% BM_ZFlat/3 74453 73128 1.2GB/s pdf (82.07 %) +1.8% BM_ZFlat/4 647674 633729 616.4MB/s html4 (22.51 %) +2.2% BM_ZFlat/5 76259 76090 308.4MB/s cp (48.12 %) +0.2% BM_ZFlat/6 31106 31084 342.1MB/s c (42.40 %) +0.1% BM_ZFlat/7 10507 10443 339.8MB/s lsp (48.37 %) +0.6% BM_ZFlat/8 1811047 1793325 547.6MB/s xls (41.23 %) +1.0% BM_ZFlat/9 597903 581793 249.3MB/s txt1 (57.87 %) +2.8% BM_ZFlat/10 525320 514522 232.0MB/s txt2 (61.93 %) +2.1% BM_ZFlat/11 1596591 1551636 262.3MB/s txt3 (54.92 %) +2.9% BM_ZFlat/12 2134523 2094033 219.5MB/s txt4 (66.22 %) +1.9% BM_ZFlat/13 593024 587869 832.6MB/s bin (18.11 %) +0.9% BM_ZFlat/14 114746 110666 329.5MB/s sum (48.96 %) +3.7% BM_ZFlat/15 14376 14485 278.3MB/s man (59.36 %) -0.8% BM_ZFlat/16 167908 150070 753.6MB/s pb (19.64 %) +11.9% BM_ZFlat/17 460228 442253 397.5MB/s gaviota (37.72 %) +4.1% BM_ZCord/0 164896 160241 609.4MB/s html +2.9% BM_ZCord/1 2070239 2043492 327.7MB/s urls +1.3% BM_ZCord/2 54402 47002 2.5GB/s jpg +15.7% BM_ZCord/3 85871 83832 1073.1MB/s pdf +2.4% BM_ZCord/4 664078 648825 602.0MB/s html4 +2.4% BM_ZDataBuffer/0 174874 172549 566.0MB/s html +1.3% BM_ZDataBuffer/1 2134410 2139173 313.0MB/s urls -0.2% BM_ZDataBuffer/2 71911 69551 1.7GB/s jpg +3.4% BM_ZDataBuffer/3 98236 99727 902.1MB/s pdf -1.5% BM_ZDataBuffer/4 710776 699104 558.8MB/s html4 +1.7% Sum of all benchmarks 27358908 27200688 +0.6% Sandy Bridge 2.6 GHz: Benchmark Base (ns) New (ns) Improvement ------------------------------------------------------------------------------------------------- BM_UFlat/0 49356 49018 1.9GB/s html +0.7% BM_UFlat/1 516764 531955 1.2GB/s urls -2.9% BM_UFlat/2 6982 7304 16.2GB/s jpg -4.4% BM_UFlat/3 15285 15598 5.6GB/s pdf -2.0% BM_UFlat/4 206557 206669 1.8GB/s html4 -0.1% BM_UFlat/5 13681 13567 1.7GB/s cp +0.8% BM_UFlat/6 6571 6592 1.6GB/s c -0.3% BM_UFlat/7 2008 1994 1.7GB/s lsp +0.7% BM_UFlat/8 775700 773286 1.2GB/s xls +0.3% BM_UFlat/9 165578 164480 881.8MB/s txt1 +0.7% BM_UFlat/10 143707 144139 828.2MB/s txt2 -0.3% BM_UFlat/11 443026 436281 932.8MB/s txt3 +1.5% BM_UFlat/12 603129 595856 771.2MB/s txt4 +1.2% BM_UFlat/13 271682 270450 1.8GB/s bin +0.5% BM_UFlat/14 26200 25666 1.4GB/s sum +2.1% BM_UFlat/15 2620 2608 1.5GB/s man +0.5% BM_UFlat/16 48908 47756 2.3GB/s pb +2.4% BM_UFlat/17 174638 170346 1031.9MB/s gaviota +2.5% BM_UValidate/0 31922 31898 3.0GB/s html +0.1% BM_UValidate/1 341265 363554 1.8GB/s urls -6.1% BM_UValidate/2 160 151 782.8GB/s jpg +6.0% BM_UValidate/3 10402 10380 8.5GB/s pdf +0.2% BM_UValidate/4 129490 130587 2.9GB/s html4 -0.8% BM_UDataBuffer/0 59383 58736 1.6GB/s html +1.1% BM_UDataBuffer/1 619222 637786 1049.8MB/s urls -2.9% BM_UDataBuffer/2 10775 11941 9.9GB/s jpg -9.8% BM_UDataBuffer/3 18002 17930 4.9GB/s pdf +0.4% BM_UDataBuffer/4 259182 259306 1.5GB/s html4 -0.0% BM_UCord/0 59379 57814 1.6GB/s html +2.7% BM_UCord/1 598456 615162 1088.4MB/s urls -2.7% BM_UCord/2 8519 8628 13.7GB/s jpg -1.3% BM_UCord/3 18123 17537 5.0GB/s pdf +3.3% BM_UCord/4 252375 252331 1.5GB/s html4 +0.0% BM_UCordString/0 49494 49790 1.9GB/s html -0.6% BM_UCordString/1 524659 541803 1.2GB/s urls -3.2% BM_UCordString/2 8206 8354 14.2GB/s jpg -1.8% BM_UCordString/3 17235 16537 5.3GB/s pdf +4.2% BM_UCordString/4 210188 211072 1.8GB/s html4 -0.4% BM_UCordValidate/0 31956 31587 3.0GB/s html +1.2% BM_UCordValidate/1 340828 362141 1.8GB/s urls -5.9% BM_UCordValidate/2 783 744 158.9GB/s jpg +5.2% BM_UCordValidate/3 10543 10462 8.4GB/s pdf +0.8% BM_UCordValidate/4 130150 129789 2.9GB/s html4 +0.3% BM_ZFlat/0 113873 111200 878.2MB/s html (22.31 %) +2.4% BM_ZFlat/1 1473023 1489858 449.4MB/s urls (47.77 %) -1.1% BM_ZFlat/2 23569 19486 6.1GB/s jpg (99.87 %) +21.0% BM_ZFlat/3 49178 48046 1.8GB/s pdf (82.07 %) +2.4% BM_ZFlat/4 475063 469394 832.2MB/s html4 (22.51 %) +1.2% BM_ZFlat/5 46910 46816 501.2MB/s cp (48.12 %) +0.2% BM_ZFlat/6 16883 16916 628.6MB/s c (42.40 %) -0.2% BM_ZFlat/7 5381 5447 651.5MB/s lsp (48.37 %) -1.2% BM_ZFlat/8 1466870 1473861 666.3MB/s xls (41.23 %) -0.5% BM_ZFlat/9 468006 464101 312.5MB/s txt1 (57.87 %) +0.8% BM_ZFlat/10 408157 408957 291.9MB/s txt2 (61.93 %) -0.2% BM_ZFlat/11 1253348 1232910 330.1MB/s txt3 (54.92 %) +1.7% BM_ZFlat/12 1702373 1702977 269.8MB/s txt4 (66.22 %) -0.0% BM_ZFlat/13 439792 438557 1116.0MB/s bin (18.11 %) +0.3% BM_ZFlat/14 80766 78851 462.5MB/s sum (48.96 %) +2.4% BM_ZFlat/15 7420 7542 534.5MB/s man (59.36 %) -1.6% BM_ZFlat/16 112043 100126 1.1GB/s pb (19.64 %) +11.9% BM_ZFlat/17 368877 357703 491.4MB/s gaviota (37.72 %) +3.1% BM_ZCord/0 116402 113564 859.9MB/s html +2.5% BM_ZCord/1 1507156 1519911 440.5MB/s urls -0.8% BM_ZCord/2 39860 33686 3.5GB/s jpg +18.3% BM_ZCord/3 56211 54694 1.6GB/s pdf +2.8% BM_ZCord/4 485594 479212 815.1MB/s html4 +1.3% BM_ZDataBuffer/0 123185 121572 803.3MB/s html +1.3% BM_ZDataBuffer/1 1569111 1589380 421.3MB/s urls -1.3% BM_ZDataBuffer/2 53143 49556 2.4GB/s jpg +7.2% BM_ZDataBuffer/3 65725 66826 1.3GB/s pdf -1.6% BM_ZDataBuffer/4 517871 514750 758.9MB/s html4 +0.6% Sum of all benchmarks 20258879 20315484 -0.3% AMD Instanbul 2.4 GHz: Benchmark Base (ns) New (ns) Improvement ------------------------------------------------------------------------------------------------- BM_UFlat/0 97120 96585 1011.1MB/s html +0.6% BM_UFlat/1 917473 948016 706.3MB/s urls -3.2% BM_UFlat/2 21496 23938 4.9GB/s jpg -10.2% BM_UFlat/3 44751 45639 1.9GB/s pdf -1.9% BM_UFlat/4 391950 391413 998.0MB/s html4 +0.1% BM_UFlat/5 37366 37201 630.7MB/s cp +0.4% BM_UFlat/6 18350 18318 580.5MB/s c +0.2% BM_UFlat/7 5672 5661 626.9MB/s lsp +0.2% BM_UFlat/8 1533390 1529441 642.1MB/s xls +0.3% BM_UFlat/9 335477 336553 431.0MB/s txt1 -0.3% BM_UFlat/10 285140 292080 408.7MB/s txt2 -2.4% BM_UFlat/11 888507 894758 454.9MB/s txt3 -0.7% BM_UFlat/12 1187643 1210928 379.5MB/s txt4 -1.9% BM_UFlat/13 493717 507447 964.5MB/s bin -2.7% BM_UFlat/14 61740 60870 599.1MB/s sum +1.4% BM_UFlat/15 7211 7187 560.9MB/s man +0.3% BM_UFlat/16 97435 93100 1.2GB/s pb +4.7% BM_UFlat/17 362662 356395 493.2MB/s gaviota +1.8% BM_UValidate/0 47475 47118 2.0GB/s html +0.8% BM_UValidate/1 501304 529741 1.2GB/s urls -5.4% BM_UValidate/2 276 243 486.2GB/s jpg +13.6% BM_UValidate/3 16361 16261 5.4GB/s pdf +0.6% BM_UValidate/4 190741 190353 2.0GB/s html4 +0.2% BM_UDataBuffer/0 111080 109771 889.6MB/s html +1.2% BM_UDataBuffer/1 1051035 1085999 616.5MB/s urls -3.2% BM_UDataBuffer/2 25801 25463 4.6GB/s jpg +1.3% BM_UDataBuffer/3 50493 49946 1.8GB/s pdf +1.1% BM_UDataBuffer/4 447258 444138 879.5MB/s html4 +0.7% BM_UCord/0 109350 107909 905.0MB/s html +1.3% BM_UCord/1 1023396 1054964 634.7MB/s urls -3.0% BM_UCord/2 25292 24371 4.9GB/s jpg +3.8% BM_UCord/3 48955 49736 1.8GB/s pdf -1.6% BM_UCord/4 440452 437331 893.2MB/s html4 +0.7% BM_UCordString/0 98511 98031 996.2MB/s html +0.5% BM_UCordString/1 933230 963495 694.9MB/s urls -3.1% BM_UCordString/2 23311 24076 4.9GB/s jpg -3.2% BM_UCordString/3 45568 46196 1.9GB/s pdf -1.4% BM_UCordString/4 397791 396934 984.1MB/s html4 +0.2% BM_UCordValidate/0 47537 46921 2.0GB/s html +1.3% BM_UCordValidate/1 505071 532716 1.2GB/s urls -5.2% BM_UCordValidate/2 1663 1621 72.9GB/s jpg +2.6% BM_UCordValidate/3 16890 16926 5.2GB/s pdf -0.2% BM_UCordValidate/4 192365 191984 2.0GB/s html4 +0.2% BM_ZFlat/0 184708 179103 545.3MB/s html (22.31 %) +3.1% BM_ZFlat/1 2293864 2302950 290.7MB/s urls (47.77 %) -0.4% BM_ZFlat/2 52852 47618 2.5GB/s jpg (99.87 %) +11.0% BM_ZFlat/3 100766 96179 935.3MB/s pdf (82.07 %) +4.8% BM_ZFlat/4 741220 727977 536.6MB/s html4 (22.51 %) +1.8% BM_ZFlat/5 85402 85418 274.7MB/s cp (48.12 %) -0.0% BM_ZFlat/6 36558 36494 291.4MB/s c (42.40 %) +0.2% BM_ZFlat/7 12706 12507 283.7MB/s lsp (48.37 %) +1.6% BM_ZFlat/8 2336823 2335688 420.5MB/s xls (41.23 %) +0.0% BM_ZFlat/9 701804 681153 212.9MB/s txt1 (57.87 %) +3.0% BM_ZFlat/10 606700 597194 199.9MB/s txt2 (61.93 %) +1.6% BM_ZFlat/11 1852283 1803238 225.7MB/s txt3 (54.92 %) +2.7% BM_ZFlat/12 2475527 2443354 188.1MB/s txt4 (66.22 %) +1.3% BM_ZFlat/13 694497 696654 702.6MB/s bin (18.11 %) -0.3% BM_ZFlat/14 136929 129855 280.8MB/s sum (48.96 %) +5.4% BM_ZFlat/15 17172 17124 235.4MB/s man (59.36 %) +0.3% BM_ZFlat/16 190364 171763 658.4MB/s pb (19.64 %) +10.8% BM_ZFlat/17 567285 555190 316.6MB/s gaviota (37.72 %) +2.2% BM_ZCord/0 193490 187031 522.1MB/s html +3.5% BM_ZCord/1 2427537 2415315 277.2MB/s urls +0.5% BM_ZCord/2 85378 81412 1.5GB/s jpg +4.9% BM_ZCord/3 121898 119419 753.3MB/s pdf +2.1% BM_ZCord/4 779564 762961 512.0MB/s html4 +2.2% BM_ZDataBuffer/0 213820 207272 471.1MB/s html +3.2% BM_ZDataBuffer/1 2589010 2586495 258.9MB/s urls +0.1% BM_ZDataBuffer/2 121871 118885 1018.4MB/s jpg +2.5% BM_ZDataBuffer/3 145382 145986 616.2MB/s pdf -0.4% BM_ZDataBuffer/4 868117 852754 458.1MB/s html4 +1.8% Sum of all benchmarks 33771833 33744763 +0.1% git-svn-id: https://snappy.googlecode.com/svn/trunk@71 03e5f5b5-db94-4691-08a0-1a8bf15f6143 |
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snappy.mirrorbot@gmail.com
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81f34784b7 |
Adjust the Snappy open-source distribution for the changes in Google's
internal file API. R=sanjay git-svn-id: https://snappy.googlecode.com/svn/trunk@70 03e5f5b5-db94-4691-08a0-1a8bf15f6143 |
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snappy.mirrorbot@gmail.com
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698af469b4 |
Change a few ORs to additions where they don't matter. This helps the compiler
use the LEA instruction more efficiently, since e.g. a + (b << 2) can be encoded as one instruction. Even more importantly, it can constant-fold the COPY_* enums together with the shifted negative constants, which also saves some instructions. (We don't need it for LITERAL, since it happens to be 0.) I am unsure why the compiler couldn't do this itself, but the theory is that it cannot prove that len-1 and len-4 cannot underflow/wrap, and thus can't do the optimization safely. The gains are small but measurable; 0.5-1.0% over the BM_Z* benchmarks (measured on Westmere, Sandy Bridge and Istanbul). R=sanjay git-svn-id: https://snappy.googlecode.com/svn/trunk@69 03e5f5b5-db94-4691-08a0-1a8bf15f6143 |