Right now, xcompmgr and automatic update compositing are excruciatingly slow due
to source copies not being supported in XAA. Attaching a diff to add support
for this using XAAScreenToScreenBitBlt to do the copy. This brings xcompmgr -c
up to being quite tolerable performance-wise, and plain xcompmgr (and automatic
update as well, probably) is quite nice.
Created attachment 634 [details] [review]
untransformed nonrepeating source copy acceleration
Committed a different diff.