[Webkit-unassigned] [Bug 158906] REGRESSION(concurrent baseline JIT): Kraken/ai-astar runs 20% slower

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=158906

--- Comment #4 from Filip Pizlo <fpizlo at apple.com> ---
I believe that this resolves the Kraken issue.  Here are the numbers now.

FROM = concurrent baseline JIT completely disabled.
TO = my change, which uses synchronous compilation of the thread is busy.

TEST                         COMPARISON            FROM                 TO               DETAILS

====================================================================================

** TOTAL **:                 1.013x as fast    826.1ms +/- 0.6%   815.5ms +/- 1.1%     significant

====================================================================================

  ai:                        *1.043x as slow*   85.3ms +/- 2.0%    89.0ms +/- 1.6%     significant
    astar:                   *1.043x as slow*   85.3ms +/- 2.0%    89.0ms +/- 1.6%     significant

  audio:                     1.037x as fast    259.1ms +/- 1.1%   249.8ms +/- 2.9%     significant
    beat-detection:          ??                 58.1ms +/- 3.7%    59.1ms +/- 11.5%     might be *1.017x as slow*
    dft:                     1.100x as fast    103.1ms +/- 2.1%    93.7ms +/- 2.1%     significant
    fft:                     -                  43.9ms +/- 1.8%    42.9ms +/- 2.4% 
    oscillator:              ??                 54.0ms +/- 1.2%    54.1ms +/- 2.1%     might be *1.002x as slow*

  imaging:                   ??                185.1ms +/- 1.0%   185.6ms +/- 2.5%     might be *1.003x as slow*
    gaussian-blur:           -                  64.2ms +/- 2.2%    62.2ms +/- 3.4% 
    darkroom:                ??                 72.9ms +/- 1.0%    73.5ms +/- 0.8%     might be *1.008x as slow*
    desaturate:              ??                 48.0ms +/- 5.1%    49.9ms +/- 6.5%     might be *1.040x as slow*

  json:                      -                  58.7ms +/- 1.3%    57.8ms +/- 1.3% 
    parse-financial:         -                  35.2ms +/- 1.6%    34.8ms +/- 1.6% 
    stringify-tinderbox:     1.022x as fast     23.5ms +/- 1.6%    23.0ms +/- 1.5%     significant

  stanford:                  1.020x as fast    237.9ms +/- 0.8%   233.3ms +/- 1.2%     significant
    crypto-aes:              1.045x as fast     51.5ms +/- 1.9%    49.3ms +/- 1.2%     significant
    crypto-ccm:              -                  48.4ms +/- 1.9%    48.3ms +/- 4.7% 
    crypto-pbkdf2:           1.014x as fast     99.6ms +/- 1.3%    98.2ms +/- 0.6%     significant
    crypto-sha256-iterative: 1.024x as fast     38.4ms +/- 1.3%    37.5ms +/- 1.3%     significant

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