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

Previous Next

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.

Full log

View this message in rfc822 format

From: Eli Zaretskii <eliz <at> gnu.org>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 57207 <at> debbugs.gnu.org, yantar92 <at> gmail.com
Subject: bug#57207: 29.0.50; Fontification is slow after e7b5912b23 (Improvements to long lines handling)
Date: Sat, 20 Aug 2022 13:33:29 +0300

> From: Lars Ingebrigtsen <larsi <at> gnus.org>
> Cc: 57207 <at> debbugs.gnu.org,  yantar92 <at> gmail.com
> Date: Sat, 20 Aug 2022 11:57:44 +0200
> 
> I'm not quite understanding why we're narrowing here in the first place.
> Point is not in a long line in this test case -- there's just a long
> line (hidden under a display property) earlier in the buffer.

Once a single long line is detected, the flag is turned on in the
buffer, and all the optimizations/shortcuts, including narrowing, are
applied regardless.

A long line hidden by a display property is indeed a problem: it
doesn't present any issue for the display engine, but is still counted
as a potential problem.
This bug report was last modified 2 years and 169 days ago.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.