GNU bug report logs - #56682
Fix the long lines font locking related slowdowns

Previous Next

Full log

Message #844 received at 56682 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 56682 <at> debbugs.gnu.org, gregory <at> heytings.org,
 Stefan Monnier <monnier <at> iro.umontreal.ca>, dgutov <at> yandex.ru
Subject: Re: bug#56682: Fix the long lines font locking related slowdowns
Date: Thu, 04 Aug 2022 08:23:23 +0200

By the way, playing with Alan's example here a bit...  To recap, this is
the test case (in a .cc file):

---
char long_line[] = R"foo(

)foo"
---

If I insert a 1M long line there (with `C-y'), Emacs will hang
indefinitely.  Wasn't the long-line stuff supposed to trigger in these
situations?  Or is it hanging in some cc-mode stuff before we get that
far?

`C-g' a number of times will eventually get out of the hang, but then
Emacs hangs again.  `C-g' again a few times breaks out of that, and then
finally Emacs becomes responsive.  If I load the file with the 1M line
from the start, then Emacs is responsive all the time.

Previous Next

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