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

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Tue Mar 18 18:15:27 PDT 2008


--- 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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