• Katie Hockman's avatar
    compress: reduce copies of new text for compression testing · fdceb2a1
    Katie Hockman authored
    The previous book was 387 KiB decompressed and 119 KiB compressed, the
    new book is 567 KiB decompressed and 132 KiB compressed. Overall, this
    change will reduce the release binary size by 196 KiB. The new book will
    allow for slightly more extensive compression testing with a larger
    text.
    
    Command to run the benchmark tests used with benchstat:
    `../bin/go test -run='^$' -count=4 -bench=. compress/bzip2 compress/flate`
    
    When running the benchmarks locally, changed "Newton" to "Twain" and
    filtered the tests with the -bench flag to include only those which were
    relevant to these changes.
    
    benchstat results below:
    
    name                            old time/op    new time/op     delta
    DecodeTwain-8                     19.6ms ± 2%     24.1ms ± 1%  +23.04%  (p=0.029 n=4+4)
    Decode/Twain/Huffman/1e4-8         140µs ± 3%      139µs ± 5%     ~     (p=0.886 n=4+4)
    Decode/Twain/Huffman/1e5-8        1.27ms ± 3%     1.26ms ± 1%     ~     (p=1.000 n=4+4)
    Decode/Twain/Huffman/1e6-8        12.4ms ± 0%     13.2ms ± 1%   +6.42%  (p=0.029 n=4+4)
    Decode/Twain/Speed/1e4-8           133µs ± 1%      123µs ± 1%   -7.35%  (p=0.029 n=4+4)
    Decode/Twain/Speed/1e5-8          1.20ms ± 0%     1.02ms ± 3%  -15.32%  (p=0.029 n=4+4)
    Decode/Twain/Speed/1e6-8          12.0ms ± 2%     10.1ms ± 3%  -15.89%  (p=0.029 n=4+4)
    Decode/Twain/Default/1e4-8         131µs ± 6%      108µs ± 5%  -17.84%  (p=0.029 n=4+4)
    Decode/Twain/Default/1e5-8        1.06ms ± 2%     0.80ms ± 1%  -24.97%  (p=0.029 n=4+4)
    Decode/Twain/Default/1e6-8        10.0ms ± 3%      8.0ms ± 3%  -20.06%  (p=0.029 n=4+4)
    Decode/Twain/Compression/1e4-8     128µs ± 4%      115µs ± 4%   -9.70%  (p=0.029 n=4+4)
    Decode/Twain/Compression/1e5-8    1.04ms ± 2%     0.83ms ± 4%  -20.37%  (p=0.029 n=4+4)
    Decode/Twain/Compression/1e6-8    10.4ms ± 4%      8.1ms ± 5%  -22.25%  (p=0.029 n=4+4)
    Encode/Twain/Huffman/1e4-8        55.7µs ± 2%     55.6µs ± 1%     ~     (p=1.000 n=4+4)
    Encode/Twain/Huffman/1e5-8         441µs ± 0%      435µs ± 2%     ~     (p=0.343 n=4+4)
    Encode/Twain/Huffman/1e6-8        4.31ms ± 4%     4.30ms ± 4%     ~     (p=0.886 n=4+4)
    Encode/Twain/Speed/1e4-8           193µs ± 1%      166µs ± 2%  -14.09%  (p=0.029 n=4+4)
    Encode/Twain/Speed/1e5-8          1.54ms ± 1%     1.22ms ± 1%  -20.53%  (p=0.029 n=4+4)
    Encode/Twain/Speed/1e6-8          15.3ms ± 1%     12.2ms ± 3%  -20.62%  (p=0.029 n=4+4)
    Encode/Twain/Default/1e4-8         393µs ± 1%      390µs ± 1%     ~     (p=0.114 n=4+4)
    Encode/Twain/Default/1e5-8        6.12ms ± 4%     6.02ms ± 5%     ~     (p=0.486 n=4+4)
    Encode/Twain/Default/1e6-8        69.4ms ± 5%     59.0ms ± 4%  -15.07%  (p=0.029 n=4+4)
    Encode/Twain/Compression/1e4-8     423µs ± 2%      379µs ± 2%  -10.34%  (p=0.029 n=4+4)
    Encode/Twain/Compression/1e5-8    7.00ms ± 1%     7.88ms ± 3%  +12.49%  (p=0.029 n=4+4)
    Encode/Twain/Compression/1e6-8    76.6ms ± 5%     80.9ms ± 3%     ~     (p=0.114 n=4+4)
    
    name                            old speed      new speed       delta
    DecodeTwain-8                   19.8MB/s ± 2%   23.6MB/s ± 1%  +18.84%  (p=0.029 n=4+4)
    Decode/Twain/Huffman/1e4-8      71.7MB/s ± 3%   72.1MB/s ± 6%     ~     (p=0.943 n=4+4)
    Decode/Twain/Huffman/1e5-8      78.8MB/s ± 3%   79.5MB/s ± 1%     ~     (p=1.000 n=4+4)
    Decode/Twain/Huffman/1e6-8      80.5MB/s ± 0%   75.6MB/s ± 1%   -6.03%  (p=0.029 n=4+4)
    Decode/Twain/Speed/1e4-8        75.2MB/s ± 1%   81.2MB/s ± 1%   +7.93%  (p=0.029 n=4+4)
    Decode/Twain/Speed/1e5-8        83.4MB/s ± 0%   98.6MB/s ± 3%  +18.16%  (p=0.029 n=4+4)
    Decode/Twain/Speed/1e6-8        83.6MB/s ± 2%   99.5MB/s ± 3%  +18.91%  (p=0.029 n=4+4)
    Decode/Twain/Default/1e4-8      76.3MB/s ± 6%   92.8MB/s ± 4%  +21.62%  (p=0.029 n=4+4)
    Decode/Twain/Default/1e5-8      94.4MB/s ± 3%  125.7MB/s ± 1%  +33.24%  (p=0.029 n=4+4)
    Decode/Twain/Default/1e6-8       100MB/s ± 3%    125MB/s ± 3%  +25.12%  (p=0.029 n=4+4)
    Decode/Twain/Compression/1e4-8  78.4MB/s ± 4%   86.8MB/s ± 4%  +10.73%  (p=0.029 n=4+4)
    Decode/Twain/Compression/1e5-8  95.7MB/s ± 2%  120.3MB/s ± 4%  +25.65%  (p=0.029 n=4+4)
    Decode/Twain/Compression/1e6-8  96.4MB/s ± 4%  124.0MB/s ± 5%  +28.64%  (p=0.029 n=4+4)
    Encode/Twain/Huffman/1e4-8       179MB/s ± 2%    180MB/s ± 1%     ~     (p=1.000 n=4+4)
    Encode/Twain/Huffman/1e5-8       227MB/s ± 0%    230MB/s ± 2%     ~     (p=0.343 n=4+4)
    Encode/Twain/Huffman/1e6-8       232MB/s ± 4%    233MB/s ± 4%     ~     (p=0.886 n=4+4)
    Encode/Twain/Speed/1e4-8        51.8MB/s ± 1%   60.4MB/s ± 2%  +16.43%  (p=0.029 n=4+4)
    Encode/Twain/Speed/1e5-8        65.1MB/s ± 1%   81.9MB/s ± 1%  +25.83%  (p=0.029 n=4+4)
    Encode/Twain/Speed/1e6-8        65.2MB/s ± 1%   82.2MB/s ± 3%  +26.00%  (p=0.029 n=4+4)
    Encode/Twain/Default/1e4-8      25.4MB/s ± 1%   25.6MB/s ± 1%     ~     (p=0.114 n=4+4)
    Encode/Twain/Default/1e5-8      16.4MB/s ± 4%   16.6MB/s ± 5%     ~     (p=0.486 n=4+4)
    Encode/Twain/Default/1e6-8      14.4MB/s ± 6%   17.0MB/s ± 4%  +17.67%  (p=0.029 n=4+4)
    Encode/Twain/Compression/1e4-8  23.6MB/s ± 2%   26.4MB/s ± 2%  +11.54%  (p=0.029 n=4+4)
    Encode/Twain/Compression/1e5-8  14.3MB/s ± 1%   12.7MB/s ± 3%  -11.08%  (p=0.029 n=4+4)
    Encode/Twain/Compression/1e6-8  13.1MB/s ± 4%   12.4MB/s ± 3%     ~     (p=0.114 n=4+4)
    
    name                            old alloc/op   new alloc/op    delta
    DecodeTwain-8                     3.63MB ± 0%     3.63MB ± 0%   +0.15%  (p=0.029 n=4+4)
    Decode/Twain/Huffman/1e4-8        42.0kB ± 0%     41.3kB ± 0%   -1.62%  (p=0.029 n=4+4)
    Decode/Twain/Huffman/1e5-8        43.5kB ± 0%     45.1kB ± 0%   +3.74%  (p=0.029 n=4+4)
    Decode/Twain/Huffman/1e6-8        71.7kB ± 0%     80.0kB ± 0%  +11.55%  (p=0.029 n=4+4)
    Decode/Twain/Speed/1e4-8          41.2kB ± 0%     41.3kB ± 0%     ~     (p=0.286 n=4+4)
    Decode/Twain/Speed/1e5-8          45.1kB ± 0%     43.9kB ± 0%   -2.80%  (p=0.029 n=4+4)
    Decode/Twain/Speed/1e6-8          72.8kB ± 0%     81.3kB ± 0%  +11.72%  (p=0.029 n=4+4)
    Decode/Twain/Default/1e4-8        41.2kB ± 0%     41.2kB ± 0%   -0.22%  (p=0.029 n=4+4)
    Decode/Twain/Default/1e5-8        44.4kB ± 0%     43.0kB ± 0%   -3.02%  (p=0.029 n=4+4)
    Decode/Twain/Default/1e6-8        71.0kB ± 0%     61.8kB ± 0%  -13.00%  (p=0.029 n=4+4)
    Decode/Twain/Compression/1e4-8    41.3kB ± 0%     41.2kB ± 0%   -0.29%  (p=0.029 n=4+4)
    Decode/Twain/Compression/1e5-8    43.3kB ± 0%     43.0kB ± 0%   -0.72%  (p=0.029 n=4+4)
    Decode/Twain/Compression/1e6-8    69.1kB ± 0%     63.7kB ± 0%   -7.90%  (p=0.029 n=4+4)
    
    name                            old allocs/op  new allocs/op   delta
    DecodeTwain-8                       51.0 ± 0%       51.2 ± 1%     ~     (p=1.000 n=4+4)
    Decode/Twain/Huffman/1e4-8          15.0 ± 0%       14.0 ± 0%   -6.67%  (p=0.029 n=4+4)
    Decode/Twain/Huffman/1e5-8          20.0 ± 0%       23.0 ± 0%  +15.00%  (p=0.029 n=4+4)
    Decode/Twain/Huffman/1e6-8           134 ± 0%        161 ± 0%  +20.15%  (p=0.029 n=4+4)
    Decode/Twain/Speed/1e4-8            17.0 ± 0%       18.0 ± 0%   +5.88%  (p=0.029 n=4+4)
    Decode/Twain/Speed/1e5-8            30.0 ± 0%       31.0 ± 0%   +3.33%  (p=0.029 n=4+4)
    Decode/Twain/Speed/1e6-8             193 ± 0%        228 ± 0%  +18.13%  (p=0.029 n=4+4)
    Decode/Twain/Default/1e4-8          17.0 ± 0%       15.0 ± 0%  -11.76%  (p=0.029 n=4+4)
    Decode/Twain/Default/1e5-8          28.0 ± 0%       32.0 ± 0%  +14.29%  (p=0.029 n=4+4)
    Decode/Twain/Default/1e6-8           199 ± 0%        158 ± 0%  -20.60%  (p=0.029 n=4+4)
    Decode/Twain/Compression/1e4-8      17.0 ± 0%       15.0 ± 0%  -11.76%  (p=0.029 n=4+4)
    Decode/Twain/Compression/1e5-8      28.0 ± 0%       32.0 ± 0%  +14.29%  (p=0.029 n=4+4)
    Decode/Twain/Compression/1e6-8       196 ± 0%        150 ± 0%  -23.47%  (p=0.029 n=4+4)
    
    Updates #27151
    
    Change-Id: I6c439694ed16a33bb4c63fbfb8570c7de46b4f2d
    Reviewed-on: https://go-review.googlesource.com/135495Reviewed-by: 's avatarDmitri Shuralyov <dmitshur@golang.org>
    Reviewed-by: 's avatarJoe Tsai <thebrokentoaster@gmail.com>
    fdceb2a1
bzip2_test.go 6.35 KB