[webkit-dev] SunSpider: GCC 4.0 vs. 4.2 results

[Jon Shier]

Devs:
	Thought this may interest someone. Overall 4.2 gives SunSpider a  
small speedup, but there are several tests in which it actually slows  
it down. These tests were run using the command line sunspider  
application after clean builds on Quad G5, using both the default  
settings and manually switching the projects to use GCC 4.2. Here is  
the result comparison:

TEST                   COMPARISON            FROM                  
TO             DETAILS

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

** TOTAL **:           1.026x as fast    2969.7ms +/- 0.2%   2893.6ms  
+/- 0.3%     significant

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

  3d:                  1.076x as fast     399.9ms +/- 0.7%    371.7ms  
+/- 0.6%     significant
    cube:              1.116x as fast     127.1ms +/- 0.5%    113.9ms  
+/- 0.6%     significant
    morph:             1.086x as fast     145.7ms +/- 1.0%    134.2ms  
+/- 0.9%     significant
    raytrace:          1.028x as fast     127.1ms +/- 0.9%    123.6ms  
+/- 0.6%     significant

  access:              1.006x as fast     355.5ms +/- 0.3%    353.4ms  
+/- 0.2%     significant
    binary-trees:      1.122x as fast      54.3ms +/- 0.6%     48.4ms  
+/- 0.8%     significant
    fannkuch:          *1.047x as slow*    98.7ms +/- 0.3%    103.3ms  
+/- 0.5%     significant
    nbody:             1.008x as fast     174.1ms +/- 0.4%    172.7ms  
+/- 0.3%     significant
    nsieve:            *1.021x as slow*    28.4ms +/- 1.3%     29.0ms  
+/- 0.0%     significant

  bitops:              *1.087x as slow*   244.6ms +/- 0.3%    265.8ms  
+/- 0.9%     significant
    3bit-bits-in-byte: *1.138x as slow*    35.6ms +/- 1.4%     40.5ms  
+/- 0.9%     significant
    bits-in-byte:      *1.099x as slow*    47.3ms +/- 0.7%     52.0ms  
+/- 0.0%     significant
    bitwise-and:       *1.25x as slow*     76.2ms +/- 0.4%     95.3ms  
+/- 2.5%     significant
    nsieve-bits:       1.096x as fast      85.5ms +/- 0.4%     78.0ms  
+/- 0.4%     significant

  controlflow:         *1.175x as slow*    22.9ms +/- 1.0%     26.9ms  
+/- 0.8%     significant
    recursive:         *1.175x as slow*    22.9ms +/- 1.0%     26.9ms  
+/- 0.8%     significant

  crypto:              1.027x as fast     179.0ms +/- 0.6%    174.3ms  
+/- 0.7%     significant
    aes:               *1.071x as slow*    52.3ms +/- 0.7%     56.0ms  
+/- 0.6%     significant
    md5:               1.082x as fast      64.6ms +/- 1.3%     59.7ms  
+/- 0.6%     significant
    sha1:              1.060x as fast      62.1ms +/- 1.1%     58.6ms  
+/- 1.3%     significant

  date:                -                  252.1ms +/- 0.8%    252.1ms  
+/- 0.7%
    format-tofte:      1.040x as fast     139.0ms +/- 1.1%    133.7ms  
+/- 0.6%     significant
    format-xparb:      *1.047x as slow*   113.1ms +/- 0.7%    118.4ms  
+/- 1.0%     significant

  math:                1.063x as fast     353.1ms +/- 1.1%    332.1ms  
+/- 0.5%     significant
    cordic:            1.057x as fast     114.6ms +/- 2.1%    108.4ms  
+/- 0.3%     significant
    partial-sums:      1.030x as fast     157.0ms +/- 0.8%    152.5ms  
+/- 0.7%     significant
    spectral-norm:     1.145x as fast      81.5ms +/- 1.2%     71.2ms  
+/- 0.8%     significant

  regexp:              1.110x as fast     403.6ms +/- 0.2%    363.5ms  
+/- 0.2%     significant
    dna:               1.110x as fast     403.6ms +/- 0.2%    363.5ms  
+/- 0.2%     significant

  string:              1.007x as fast     759.0ms +/- 0.3%    753.8ms  
+/- 0.5%     significant
    base64:            *1.060x as slow*   100.5ms +/- 1.0%    106.5ms  
+/- 2.3%     significant
    fasta:             1.102x as fast     152.7ms +/- 0.8%    138.6ms  
+/- 0.8%     significant
    tagcloud:          *1.011x as slow*   179.5ms +/- 0.7%    181.5ms  
+/- 0.6%     significant
    unpack-code:       *1.014x as slow*   198.2ms +/- 0.3%    201.0ms  
+/- 0.5%     significant
    validate-input:    1.015x as fast     128.1ms +/- 1.0%    126.2ms  
+/- 0.9%     significant


4.0 is the From column, so 4.2 is the To. I don't know how useful  
these results will be, just thought I'd share.



Jon Shier