[Webkit-unassigned] [Bug 105405] [EFL] Use libjpeg-turbo instead of libjpeg

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=105405





--- Comment #6 from Jussi Kukkonen (jku) <jussi.kukkonen at intel.com>  2012-12-19 14:28:09 PST ---
(In reply to comment #5)
>  1. perf testing to make sure there is an actual Win here

Using the patch in bug 103463, I informally tested the decoders using two different cat pictures (both baseline jpeg): I figured internet is mostly cat pictures so that should be very representative. 

libjpeg-turbo execution time was 70-75% _less_ than libjpeg in both cases. The variance of the results was fairly high, but even without statistical analysis I can promise that the results are significant: libjpeg-turbo is far faster.

I've not tried to test how much this might help on a image-heavy page, but it could be very noticeable: According to the decoder test, decoding 10 very large images can take (the order of) 1 second on my i5.

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