Subject: Re: bug#11484: 23.4; Scrolling leaves traces of old text behind

From: Achim Gratz <[email-masked]>
Date: Mon, 22 Oct 2012 19:27:07 +0200

Daniel Colascione writes:
> Are displays still slow enough that we have to care about graphics optimization
> at this level?

Yes, at least for certain combinations of X server and graphics card
driver.  Also, the combination of Emacs and Gtk+ seems to trigger a
codepath in the display driver that is especially slow, even more so if
scroll-bars are switched on.  On my RV350-based AGP card this makes
Emacs' display updates about 80x slower than usual and I can assure you
that this is very noticeable (and annoying).

Regards,
Achim.
-- 
+<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+

Waldorf MIDI Implementation & additional documentation:
http://Synth.Stromeko.net/Downloads.html#WaldorfDocs