Re: slow X11 frame creation and refresh after occlusion

[Greg Klanderman]

>>>>> On February 1, 2021 Robert Pluim <rpluim@gmail.com> wrote:

Greg> (frame-parameter nil 'font-backend)
Greg> (xfthb x)

Greg> any suggestions for settings I can try?

> Configure '--with-cairo'. I'm hoping that will be more efficient in
> terms of loading fonts.

OK I will have a look.  Is there any way to determine if font loading
is causing significant delay?  And would that be an issue on
subsequent to the first frame on a display?

Greg> (emacs-version)
Greg> "GNU Emacs 27.1 (build 1, x86_64-pc-linux-gnu, X toolkit, Xaw3d scroll 
bars)
Greg> of 2020-12-21, modified by Debian"

> Definitely not in there, it's master-only:

> $ git log --author rpluim@gmail.com --grep font

>     commit 20d13e424fb2e7dcc5e6ea1848bca4376d22bab1
>     Author: Robert Pluim <rpluim@gmail.com>
>     Date:   Fri Sep 11 10:29:24 2020 +0200

>         Stop querying for fonts as soon as a match is found

OK, another good pointer.

Did you have any ideas on my other email, and the finding that the
30-60 sec of lossage I am seeing when dragging one emacs frame over
another seems related to not running a full blown desktop environment?

Have to see if I can trace the xevents and find anything interesting..

thank you,
Greg