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inflate: 10-15% faster decompression #293

Merged
merged 2 commits into from
Nov 10, 2020
Merged

inflate: 10-15% faster decompression #293

merged 2 commits into from
Nov 10, 2020

Commits on Nov 9, 2020

  1. inflate: 10-15% faster decompression 

    ```
λ benchcmp before.txt after.txt
benchmark                               old ns/op     new ns/op     delta
BenchmarkDecodeDigitsSpeed1e4-32        56514         52065         -7.87%
BenchmarkDecodeDigitsSpeed1e5-32        640875        554792        -13.43%
BenchmarkDecodeDigitsSpeed1e6-32        6402174       5513890       -13.87%
BenchmarkDecodeDigitsDefault1e4-32      61343         54619         -10.96%
BenchmarkDecodeDigitsDefault1e5-32      622027        537596        -13.57%
BenchmarkDecodeDigitsDefault1e6-32      6236843       5297780       -15.06%
BenchmarkDecodeDigitsCompress1e4-32     60749         54412         -10.43%
BenchmarkDecodeDigitsCompress1e5-32     676871        596456        -11.88%
BenchmarkDecodeDigitsCompress1e6-32     6749999       5935333       -12.07%
BenchmarkDecodeTwainSpeed1e4-32         59802         53984         -9.73%
BenchmarkDecodeTwainSpeed1e5-32         629727        547914        -12.99%
BenchmarkDecodeTwainSpeed1e6-32         6247368       5438356       -12.95%
BenchmarkDecodeTwainDefault1e4-32       59156         52760         -10.81%
BenchmarkDecodeTwainDefault1e5-32       584153        512330        -12.30%
BenchmarkDecodeTwainDefault1e6-32       5725959       4933883       -13.83%
BenchmarkDecodeTwainCompress1e4-32      56871         51282         -9.83%
BenchmarkDecodeTwainCompress1e5-32      535344        469828        -12.24%
BenchmarkDecodeTwainCompress1e6-32      5266667       4636718       -11.96%
BenchmarkDecodeRandomSpeed1e4-32        314           311           -0.96%
BenchmarkDecodeRandomSpeed1e5-32        1962          1955          -0.36%
BenchmarkDecodeRandomSpeed1e6-32        20149         20369         +1.09%

benchmark                               old MB/s     new MB/s     speedup
BenchmarkDecodeDigitsSpeed1e4-32        176.95       192.07       1.09x
BenchmarkDecodeDigitsSpeed1e5-32        156.04       180.25       1.16x
BenchmarkDecodeDigitsSpeed1e6-32        156.20       181.36       1.16x
BenchmarkDecodeDigitsDefault1e4-32      163.02       183.09       1.12x
BenchmarkDecodeDigitsDefault1e5-32      160.76       186.01       1.16x
BenchmarkDecodeDigitsDefault1e6-32      160.34       188.76       1.18x
BenchmarkDecodeDigitsCompress1e4-32     164.61       183.78       1.12x
BenchmarkDecodeDigitsCompress1e5-32     147.74       167.66       1.13x
BenchmarkDecodeDigitsCompress1e6-32     148.15       168.48       1.14x
BenchmarkDecodeTwainSpeed1e4-32         167.22       185.24       1.11x
BenchmarkDecodeTwainSpeed1e5-32         158.80       182.51       1.15x
BenchmarkDecodeTwainSpeed1e6-32         160.07       183.88       1.15x
BenchmarkDecodeTwainDefault1e4-32       169.04       189.54       1.12x
BenchmarkDecodeTwainDefault1e5-32       171.19       195.19       1.14x
BenchmarkDecodeTwainDefault1e6-32       174.64       202.68       1.16x
BenchmarkDecodeTwainCompress1e4-32      175.84       195.00       1.11x
BenchmarkDecodeTwainCompress1e5-32      186.80       212.84       1.14x
BenchmarkDecodeTwainCompress1e6-32      189.87       215.67       1.14x
BenchmarkDecodeRandomSpeed1e4-32        31888.50     32136.37     1.01x
BenchmarkDecodeRandomSpeed1e5-32        50976.74     51150.89     1.00x
BenchmarkDecodeRandomSpeed1e6-32        49629.09     49094.25     0.99x
```
    @klauspost
    klauspost committed Nov 9, 2020
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  2. Correct comment

    @klauspost
    klauspost committed Nov 9, 2020
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