[cairo-bugs] [Bug 11529] Performance of cairo is not good without XRender extension

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Tue Jul 10 20:49:48 PDT 2007


------- Comment #6 from daniel.amelang at gmail.com  2007-07-10 20:49 PST -------
(In reply to comment #4)
> One thing we noticed in looking into this is when Xrender is not used, cairo is
> really bad about not caching GraphicContexts.

Unfortunately, recreating GCs probably accounts for only a small portion of the
~2x slowdown that is reported here. But it would be nice to be wrong.

If you're serious about working on performance issues, I highly recommend a
profile-based approach over the "hmmm...that code looks slow" approach. I'm
surprised that we don't get many dtrace profiles from you Sun folks in these
performance bug reports. Dtrace is the bomb!

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