RESOLVED FIXED 41409
Safari pegs CPU and drops frames on http://neography.com/experiment/circles/solarsystem/ (CSS animations) 
https://bugs.webkit.org/show_bug.cgi?id=41409
Summary Safari pegs CPU and drops frames on http://neography.com/experiment/circles/s...
Adam Roben (:aroben)
Reported 2010-06-30 07:32:39 PDT
To reproduce: 1. Go to http://neography.com/experiment/circles/solarsystem/ The animation is quite choppy. If you look at Task Manager you'll see that Safari is pegging a CPU.
Attachments
Patch (21.65 KB, patch)
2010-07-15 16:46 PDT, Simon Fraser (smfr) 		sam: review+
DetailsFormatted DiffDiff
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Adam Roben (:aroben)
Comment 1 2010-06-30 07:33:15 PDT
<rdar://problem/8146502>
Adam Roben (:aroben)
Comment 2 2010-06-30 07:35:24 PDT
On Mac, the performance is almost as bad if I turn off accelerated compositing. It looks like this page isn't getting kicked into accelerated mode on Windows.
Simon Fraser (smfr)
Comment 3 2010-06-30 11:31:46 PDT
One issue here is that in AnimationBase, m_fallbackAnimating is always set to true when we don't use hardware animation, resulting in isAnimationRunning() returning false, which causes us to not use hardware.
Simon Fraser (smfr)
Comment 4 2010-06-30 11:42:22 PDT
Ah, I think the real issue is that on Windows, we still think we have accelerated opacity and transform animations.
Simon Fraser (smfr)
Comment 5 2010-07-15 16:46:55 PDT
Created attachment 61745 [details] Patch
Simon Fraser (smfr)
Comment 6 2010-07-16 13:32:12 PDT
http://trac.webkit.org/changeset/63576
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