GNU bug report logs - #25197
26.0.50; notifications-notify is extremely slow with double buffering

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Peter Münster <pmlists <at> free.fr>
To: bug-gnu-emacs <at> gnu.org
Cc: dancol <at> dancol.org
Subject: 26.0.50; notifications-notify is extremely slow
Date: Tue, 13 Dec 2016 23:59:59 +0100

Hello,

Since

commit c29071587c64efb30792bd72248d3c791abd9337
Author: Daniel Colascione <dancol <at> dancol.org>
Date:   Thu Oct 20 20:34:36 2016 -0700
    Add double-buffering support to reduce flicker

notifications-notify is extremely slow, when the notification windows
overlap the emacs window.

Command for testing:

time src/emacs -g 300x100 -Q --eval "(progn (require 'notifications)
             (dotimes (i 20) (notifications-notify :title \"TEST\"))
             (kill-emacs))"

Result before the commit:

real    0m1.820s
user    0m0.668s
sys     0m0.060s

Result after the commit:

real    0m11.782s
user    0m0.636s
sys     0m0.128s

"-g 300x100" or something similar is needed, to get a nearly full-screen
window, so that the notifications overlap the emacs window.

How could I speed up the notifications please?

TIA for any help,
-- 
           Peter

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