RESOLVED DUPLICATE of bug 22102 27505
Use or large box-shadow radius causes lag and performance issues 
https://bugs.webkit.org/show_bug.cgi?id=27505
Summary Use or large box-shadow radius causes lag and performance issues
Josh Bryant
Reported 2009-07-21 09:28:50 PDT
When using a large radius on a box-shadow, on both Mac and PC, Safari 4 causes a massive CPU takeover in which just having it on screen can use up to 40% CPU and trying to do anything (hover over a link, type text in a text field, etc...) will spike the CPU to 100%. It also makes the entire page pretty much unusable due to the lag. I've done a test case here: http://tinycrumb.org/boxshadowcpu.html
Attachments
Test Case (38 bytes, text/plain)
2009-07-21 09:36 PDT, Josh Bryant 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Josh Bryant
Comment 1 2009-07-21 09:36:52 PDT
Created attachment 33183 [details] Test Case
Bruce Cowan
Comment 2 2010-05-01 17:10:53 PDT
I can confirm this. http://identi.ca/ is very difficult to use, and scrolls very slowly. Offending item in CSS is "-webkit-box-shadow: rgba(194, 194, 194, 0.296875) 5px 7px 7px;".
Simon Fraser (smfr)
Comment 3 2010-07-27 11:19:05 PDT
Probably dup.
Paul Irish
Comment 4 2010-08-21 12:58:34 PDT
probably a dupe of issue 22102
Simon Fraser (smfr)
Comment 5 2010-08-21 13:29:01 PDT
*** This bug has been marked as a duplicate of bug 22102 ***
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