GNU bug report logs - #11484
23.4; Scrolling leaves traces of old text behind

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Packages: emacs, ns;

Reported by: Frank Marcoline <fvmarcoline <at> gmail.com>

Date: Tue, 15 May 2012 22:13:02 UTC

Severity: normal

Found in version 23.4

Done: Jan Djärv <jan.h.d <at> swipnet.se>

Bug is archived. No further changes may be made.

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Message #28 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Achim Gratz <Stromeko <at> nexgo.de>
To: bug-gnu-emacs <at> gnu.org
Subject: Re: bug#11484: 23.4; Scrolling leaves traces of old text behind
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
This bug report was last modified 12 years and 217 days ago.

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