Expose response amazingly slow

[Daniel Stone]

On Sun, Sep 23, 2007 at 04:57:35PM +0200, sshachar at t2.technion.ac.il wrote:
> I am running a piece of GUI SW written with wxWidgets, and experiencing very
> slow refresh rates when one window obscures another and is then moved away.
> This phenomenon may be especially emphasized in the above case but is apparent
> even when moving a smiple xterm window over the latest Debian desktop. 
> 
> I thought what I'd see is that when one window is drawn on top of another, the
> contents of the back window would be saved aside (backing store?) but skimming
> the list archives it seems the composite manager magically takes care of this
> case (without caching offscreen?!).
> 
> Assuming it's not an issue with the GUI SW but rather something in my driver/X
> configuration, what could it be?

Run xcompmgr -a: it caches offscreen, and then just fires a blit.

Cheers,
Daniel
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