GNU bug report logs - #57207
29.0.50; Fontification is slow after e7b5912b23 (Improvements to long lines handling)

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Package: emacs;

Reported by: Ihor Radchenko <yantar92 <at> gmail.com>

Date: Sun, 14 Aug 2022 15:55:01 UTC

Severity: normal

Found in version 29.0.50

Done: Gregory Heytings <gregory <at> heytings.org>

Bug is archived. No further changes may be made.

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Message #176 received at 57207 <at> debbugs.gnu.org (full text, mbox):

From: Visuwesh <visuweshm <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: Lars Ingebrigtsen <larsi <at> gnus.org>, 57207 <at> debbugs.gnu.org,
 yantar92 <at> gmail.com
Subject: Re: bug#57207: 29.0.50; Fontification is slow after e7b5912b23
 (Improvements to long lines handling)
Date: Fri, 19 Aug 2022 21:50:19 +0530

[வெள்ளி ஆகஸ்ட் 19, 2022] Eli Zaretskii wrote:

> Didn't you say the reproduction recipe doesn't work in "emacs -Q",
> only in some session of yours?  If so, maybe what you have in that
> session explains why you see it and I don't?

I can reproduce it in emacs -Q using the recipe Lars posted upthread.

    (progn
      (pop-to-buffer "foo.txt")
      (flyspell-mode)
      (insert (propertize (make-string 20000 ?x) 'display "foo")
          "\n\n"))

If I type 'a' in EOB, I see Narrow appear in the mode-line if I move
using C-p, it disappears.  If I insert a character again, it reappears.
I'm on Debian, and the git HEAD is

    % git log |head -6
    commit f117b5df4dc69a38a5568c5926c1e417a35314eb
    Author: Lars Ingebrigtsen <larsi <at> gnus.org>
    Date:   Fri Aug 19 15:22:29 2022 +0200

        Add new functions eol and bol
This bug report was last modified 2 years and 169 days ago.

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