RESOLVED FIXED37272
REGRESSION (4.0.5-ToT): Horrible performance due to accelerated compositing when mousing over sidebar links at annevankesteren.nl on Windows (uses -webkit-transition) 
https://bugs.webkit.org/show_bug.cgi?id=37272
Summary REGRESSION (4.0.5-ToT): Horrible performance due to accelerated compositing w...
Adam Roben (:aroben)
Reported 2010-04-08 07:49:41 PDT
To reproduce: 1. Go to http://annevankesteren.nl/ 2. Move your mouse across the links in the sidebar (e.g., from top to bottom) The links are supposed to grow/shrink as you mouse over them. But performance is so horrible that it's really hard to see the effect at all. Compare this to Mac, where things are silky smooth.
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Adam Roben (:aroben)
Comment 1 2010-04-08 07:50:32 PDT
Things are silky smooth in 4.0.5 on Windows, so this is a regression since then.
Adam Roben (:aroben)
Comment 2 2010-04-08 07:51:08 PDT
<rdar://problem/7840824>
Adam Roben (:aroben)
Comment 3 2010-05-13 10:10:18 PDT
Turning off accelerated compositing makes the bug go away.
Adam Roben (:aroben)
Comment 4 2010-05-13 10:13:56 PDT
<http://www.nikesh.me/demo/image-hover.html> also performs worse when accelerated compositing is enabled (e.g., when moving the mouse between two images rapidly).
Adam Roben (:aroben)
Comment 5 2011-03-23 05:36:12 PDT
This seems fixed in ToT (if you have WebKitQuartzCoreAdditions.dll).
Adam Roben (:aroben)
Comment 6 2011-03-23 05:36:22 PDT
…so we should close this.
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