[Webkit-unassigned] [Bug 27505] New: Use or large box-shadow radius causes lag and performance issues

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=27505

           Summary: Use or large box-shadow radius causes lag and
                    performance issues
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: Mac OS X 10.5
            Status: UNCONFIRMED
          Severity: Major
          Priority: P1
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: joshbryant at mac.com


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

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