Subject: bug#7092: 23.1; Dired slow using Emacs remotely

From: Stefan Kangas <[email-masked]>
Date: Sun, 24 Oct 2021 15:08:27 -0700

Eli Zaretskii <[email-masked]> writes:

> I had the doc string in mind, but we could also add something to
> PROBLEMS.

How about this?

diff --git a/etc/PROBLEMS b/etc/PROBLEMS
index daff102a0d..e428e27089 100644
--- a/etc/PROBLEMS
+++ b/etc/PROBLEMS
@@ -1654,6 +1654,12 @@ This happens on the proprietary X server
ASTEC-X when the number of
 monitors is changed after the server has started.  A workaround is to
 restart the X server after the monitor configuration has been changed.

+*** With X forwarding, mouse highlighting can make Emacs slow.
+If you see slow updates when moving the mouse in an Emacs running on a
+remote X server, try this:
+
+    (setq mouse-highlight nil)
+
 * Runtime problems on character terminals

 ** The meta key does not work on xterm.