[PATCH] exa: fix performance regression from 736b6fbd2c941b6276066cd1503523edebe7bf3d

[Simon Thum]

Maarten Maathuis wrote:
> On Mon, Feb 16, 2009 at 5:38 PM, Michel Dänzer <michel at daenzer.net> wrote:
>> On Mon, 2009-02-16 at 17:20 +0100, Maarten Maathuis wrote:
>>> - The src optimisation is more aggressive and possibly harmful in
>>> light of the new initial state of pixmaps.
>>> - There is now actually a performance improvement by almost always
>>> keeping the number of rects low.
>> Looks good.
I've upgraded my xserver to 46eeaf82e228df1c5971a24dc815566516e19be9,
and now Mozilla Thunderbird has display problems (omits some parts).
Maybe that's too aggressive.

FWIW, I've implemented a similar system where region ops had a context,
allowing them to either grow or shrink resulting regions (or neither, of
coz) to achieve simpler representations. This allows to suppress such
stuff in the first place.

Cheers,

Simon