[Bug 35579] Poor performance in Firefox 4

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=35579

--- Comment #12 from Michel Dänzer <michel at daenzer.net> 2011-03-24 00:28:20 PDT ---
I can only see two causes for fallbacks in the log file:

R300CheckComposite: Component alpha not supported with source alpha and source
value blending.
R300CheckComposite: Source w/h too large (640,7760).

The former is usually related to text sub-pixel anti-aliasing and harmless, as
EXA can still accelerate that well in two passes.

The latter shows a source picture being higher than the maximum supported by
your GPU (4096). Though I suspect that even if this gets fixed in Firefox or
the test, there might be more issues down the road.

P.S. This test also runs very slowly (about 1 FPS) here on a Mac Pro running
Mac OS X...

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