GNU bug report logs - #28695
26.0.60; Rendering lag spikes caused by double-buffering on Linux

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From: Bryan Gilbert <bryan <at> bryan.sh>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: martin rudalics <rudalics <at> gmx.at>, bryan <at> bryan.sh, 28695 <at> debbugs.gnu.org
Subject: bug#28695: 26.0.60; Rendering lag spikes caused by double-buffering on Linux
Date: Wed, 04 Oct 2017 07:21:55 -0400

> Eli Zaretskii <eliz <at> gnu.org> writes:
>
> Isn't it strange that only some people see these problems, while
> others (the majority?) are very happy with double-buffering?  Could it
> be that the problems are triggered by some specific system
> configurations or Emacs build-time features?  If so, we could perhaps
> turn it off only for those configurations, because people who are
> happy with this are extremely happy, and will probably be disappointed
> if we just turn it off globally.

I'm currently using a Dell XPS 15 laptop with a 4K display and running
at a resolution of 3840x2160. I've noticed that the problem almost
entirely disappears when I resize the window to a smaller size (roughly
between 1/2 and 1/3 of the screen) instead of being fullscreen. It's
possible that this is only being noticed at higher resolutions.

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