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

[Mark Rowe]

Jon,

Thanks for these results.  I hadn't seen figures comparing GCC 4.0 to  
4.2 with SunSpider on PowerPC until now.  The results on Intel  
machines are slightly less promising however.  GCC 4.2 looks to be  
around a 10% regression over 4.0 on SunSpider on my MacBook Pro.

- Mark

On 2008-07-19, at 20:27, Jon Shier wrote:

> 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
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> webkit-dev at lists.webkit.org
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