[Bug 12671] Slow performance on blogger.com "newsticker"

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=12671





--- Comment #7 from Ross Vandegrift <ross at kallisti.us>  2008-03-18 18:15:26 PST ---
I'm able to reproduce this on blogger.com, but this is a more general bug
affecting pages Mozilla renders that use nested layers of transparency.

oprofile confirms that my test case and the blogger.com ticker hit the same
functions.  The call stack ends up calling fbPolyFillRect into exaPolyFillRect.

I'll attach three files that together make up a pretty clean test case - a div
that sets a transparent image for a page of text.  The problem is compounded
easily by nesting the divs with transparent background.

The system begins to become unusable with five or so divs nested.


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