GNU bug report logs - #64596
30.0.50; On FIXME: in src/buffer.c:1481 (force-mode-line-update)

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Message #26 received at 64596 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: yantar92 <at> posteo.net, 64596 <at> debbugs.gnu.org
Subject: Re: bug#64596: 30.0.50; On FIXME: in src/buffer.c:1481
 (force-mode-line-update)
Date: Thu, 13 Jul 2023 18:02:26 -0400

> Then I guess you or Ihor (or both) should try removing that line and
> run with that for a while.

FWIW, I've been running without those two lines ever since I put this FIXME.

> Alternatively, maybe in the case of ALL non-nil the code should set
> the prevent_redisplay_optimizations_p flag of all the buffers that are
> displayed in some window, since some redisplay optimizations are not
> eligible when the mode-line is about to be updated.

Any reason why the corresponding optimizations don't consult the
`update_mode_lines` var (or the `update_mode_line` buffer flag), or
maybe have redisplay start by propagating the `update_mode_line` buffer
flag to `prevent_redisplay_optimizations_p`?


        Stefan

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