[Webkit-unassigned] [Bug 43962] Improve FEGaussianBlur algorithm performance
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bugzilla-daemon at webkit.org
Fri Aug 13 10:45:48 PDT 2010
https://bugs.webkit.org/show_bug.cgi?id=43962
--- Comment #6 from Alejandro G. Castro <alex at igalia.com> 2010-08-13 10:45:48 PST ---
Created an attachment (id=64355)
--> (https://bugs.webkit.org/attachment.cgi?id=64355)
Oprofile log with ariya's proposed algorithm
Same test scrolling identi.ca automatically in epiphany for some time (big blur under the main box in that page)
FEGaussianBlur::apply 23.81% percent of the time divided mainly in
GraphicsContext::fillRect 16.13% copying the rotated image
FEGaussianBlur::blurHorizontal 5.05% the real algorithm
It is again fast because it is using tiling to create the shadow from a small one.
Anyway, if we could avoid the fillRects I would say the two algorithms are pretty similar, we could even add the fixed point operation to the current one and improve a little bit more.
I hope it helps.
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