Notes on fbComposite* Move To pixman?

[Anthony L. Awtrey]

Hi again.

First, thanks to those that have been helping me get my head into Xorg
code, git bisect and the rather steep learning curve to try and track
down this regression performance issue I'm having.

I've been struggling with a performance regression between Xorg 7.0 and
7.2+. The suggestion from this list has been to use git bisect to try
and figure out where the problem occurred. I have been hampered by the
fact that the functions which appear to be key in the regression
(fbCompositeSrc_8888RevNPx8888mmx and family) have been relocated from
libfb.so to pixman over this period of time. This has made tracking down
the regression more difficult since it is not a straight-forward git
bisect issue.

Does anyone have design docs / notes / irc chat logs etc. on this
change? Were there any list discussions on the impact or possible
implications of these changes that I can read? I've searched the mailing
list, but can't really find anything that helps me understand the nature
of the change. Thanks!

Tony