[Webkit-unassigned] [Bug 19378] Excessive CPU usage

[bugzilla-daemon at webkit.org]

http://bugs.webkit.org/show_bug.cgi?id=19378


webkit at mattlilek.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |webkit at mattlilek.com
          Component|JavaScriptCore              |Layout and Rendering




------- Comment #3 from webkit at mattlilek.com  2008-06-03 12:43 PDT -------
On my 2 GHz Core 2 iMac, even in a debug build, this only spikes at about 75%
and then comes down to 30%-ish for a little bit and then drops to almost
nothing.

The top of the profile for my debug build is:
Total number in stack (recursive counted multiple, when >=5):
        191      
WebCore::RenderBox::computeAbsoluteRepaintRect(WebCore::IntRect&, bool)
        173       WebCore::RenderBox::absolutePosition(int&, int&, bool) const
        158       WebCore::RenderObject::absolutePositionForContent(int&, int&,
bool) const
        50       -[NSView _convertRect:toAncestor:]
        46       WebCore::Element::recalcStyle(WebCore::Node::StyleChange)
        42       WebCore::RenderBlock::layoutBlock(bool)
        40       WebCore::RenderBlock::layoutBlockChildren(bool, int&)
        39       WebCore::RenderBlock::layout()


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