[Webkit-unassigned] [Bug 19250] New: Sunspider gets progressively slower

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Sun May 25 22:57:38 PDT 2008


http://bugs.webkit.org/show_bug.cgi?id=19250

           Summary: Sunspider gets progressively slower
           Product: WebKit
           Version: 526+ (Nightly build)
          Platform: Macintosh
               URL: http://webkit.org/perf/sunspider-0.9/sunspider.html
        OS/Version: Mac OS X 10.5
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: sherlock at genome.stanford.edu


Steps to reproduce:

1.  Launch webkit
2.  Go to bug URL
3.  Run Sunspider - make note of results, and results' URL
4.  Re-run it several times

Expected results:
Performance should be similar across runs

Actual results:
Performance is worse after each run - the overall time was always worse.

Results of a comparison between the first run and the fifth run pasted below:

TEST                   COMPARISON            FROM                 TO           
 DETAILS

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

** TOTAL **:           *1.05x as slow*   1836.8ms +/- 0.8%   1927.0ms +/- 0.3% 
   significant

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

  3d:                  *1.07x as slow*    243.2ms +/- 2.1%    259.6ms +/- 0.7% 
   significant
    cube:              *1.13x as slow*     77.4ms +/- 4.2%     87.6ms +/- 0.8% 
   significant
    morph:             ??                  80.4ms +/- 2.6%     81.0ms +/- 1.1% 
   not conclusive: might be *1.01x as slow*
    raytrace:          *1.07x as slow*     85.4ms +/- 0.8%     91.0ms +/- 1.7% 
   significant

  access:              *1.08x as slow*    293.0ms +/- 1.7%    316.6ms +/- 0.8% 
   significant
    binary-trees:      *1.27x as slow*     32.0ms +/- 2.7%     40.8ms +/- 4.0% 
   significant
    fannkuch:          -                  112.2ms +/- 2.9%    111.0ms +/- 0.0% 
    nbody:             *1.16x as slow*    117.2ms +/- 0.5%    135.6ms +/- 0.5% 
   significant
    nsieve:            -                   31.6ms +/- 8.6%     29.2ms +/- 1.9% 

  bitops:              -                  197.0ms +/- 1.3%    196.8ms +/- 0.9% 
    3bit-bits-in-byte: -                   31.2ms +/- 1.8%     31.0ms +/- 2.8% 
    bits-in-byte:      -                   37.4ms +/- 1.8%     37.2ms +/- 1.5% 
    bitwise-and:       -                   55.8ms +/- 1.9%     55.8ms +/- 1.9% 
    nsieve-bits:       ??                  72.6ms +/- 3.1%     72.8ms +/- 0.8% 
   not conclusive: might be *1.00x as slow*

  controlflow:         -                   21.2ms +/- 2.6%     21.2ms +/- 2.6% 
    recursive:         -                   21.2ms +/- 2.6%     21.2ms +/- 2.6% 

  crypto:              *1.04x as slow*    120.2ms +/- 0.5%    125.4ms +/- 1.1% 
   significant
    aes:               ??                  48.4ms +/- 1.4%     48.6ms +/- 2.3% 
   not conclusive: might be *1.00x as slow*
    md5:               *1.04x as slow*     35.8ms +/- 1.6%     37.2ms +/- 1.5% 
   significant
    sha1:              *1.10x as slow*     36.0ms +/- 0.0%     39.6ms +/- 1.7% 
   significant

  date:                *1.03x as slow*    162.2ms +/- 0.8%    167.6ms +/- 0.4% 
   significant
    format-tofte:      *1.03x as slow*     99.6ms +/- 0.7%    102.6ms +/- 0.7% 
   significant
    format-xparb:      *1.04x as slow*     62.6ms +/- 1.1%     65.0ms +/- 1.4% 
   significant

  math:                *1.12x as slow*    190.0ms +/- 0.7%    212.4ms +/- 0.9% 
   significant
    cordic:            *1.14x as slow*     63.4ms +/- 1.8%     72.0ms +/- 2.7% 
   significant
    partial-sums:      *1.10x as slow*     86.6ms +/- 1.3%     95.6ms +/- 0.7% 
   significant
    spectral-norm:     *1.12x as slow*     40.0ms +/- 0.0%     44.8ms +/- 2.3% 
   significant

  regexp:              *1.01x as slow*    175.6ms +/- 0.6%    177.2ms +/- 0.9% 
   significant
    dna:               *1.01x as slow*    175.6ms +/- 0.6%    177.2ms +/- 0.9% 
   significant

  string:              *1.04x as slow*    434.4ms +/- 0.9%    450.2ms +/- 1.0% 
   significant
    base64:            *1.03x as slow*     70.4ms +/- 1.0%     72.4ms +/- 0.9% 
   significant
    fasta:             ??                  80.8ms +/- 1.3%     81.4ms +/- 1.4% 
   not conclusive: might be *1.01x as slow*
    tagcloud:          *1.04x as slow*    102.8ms +/- 3.1%    106.8ms +/- 1.5% 
   significant
    unpack-code:       *1.02x as slow*    107.6ms +/- 0.6%    110.2ms +/- 0.9% 
   significant
    validate-input:    *1.09x as slow*     72.8ms +/- 1.4%     79.4ms +/- 3.6% 
   significant

tested with r34130 on 10.5.2 on a MacPro


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