GNU bug report logs - #71644
30.0.50; Severe slowdown in larger files with markers beginning in emacs 29+

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Message #80 received at 71644 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Ihor Radchenko <yantar92 <at> posteo.net>
Cc: Mitchell <mitchellahren <at> gmail.com>, Eli Zaretskii <eliz <at> gnu.org>,
 71644 <at> debbugs.gnu.org
Subject: Re: bug#71644: 30.0.50; Severe slowdown in larger files with
 markers beginning in emacs 29+
Date: Mon, 24 Jun 2024 23:07:32 -0400

One other thing I notice: If I use Emacs-29 but with Org-9.5.5 (i.e., the
version included in Emacs-28.2) the recipe doesn't show the slowdown.

There's still a good chance that the slow behavior is due to
chars<->bytes conversion (there's no doubt that this code's performance
can be quite poor), but I suspect the reason for the change of behavior
between Emacs-28 and Emacs-29 lies in Org rather than in Emacs's C code.
If someone more familiar with the changes that occurred in Org around
that time could try and track down the specific change that triggers the
problem, that would be appreciated.


        Stefan

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