GNU bug report logs - #16526
24.3.50; scroll-conservatively & c-mode regression

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Packages: emacs, cc-mode;

Reported by: martin rudalics <rudalics <at> gmx.at>

Date: Thu, 23 Jan 2014 08:54:02 UTC

Severity: important

Found in version 24.3.50

Done: Eli Zaretskii <eliz <at> gnu.org>

Bug is archived. No further changes may be made.

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Message #70 received at 16526 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Alan Mackenzie <acm <at> muc.de>
Cc: rudalics <at> gmx.at, 16526 <at> debbugs.gnu.org
Subject: Re: bug#16526: 24.3.50;
 scroll-conservatively & c-mode regression.	The purpose of revision
 116070.
Date: Sun, 26 Jan 2014 19:35:10 +0200

> Date: Sat, 25 Jan 2014 20:27:21 +0000
> Cc: 16526 <at> debbugs.gnu.org
> From: Alan Mackenzie <acm <at> muc.de>
> 
> If I've understood correctly, I think the root cause of the slowness is
> the lack of optimisation of find_defun_start when open-paren-etc. is nil
> - it brutally returns BOB, no matter what.

FWIW, I don't think this is the culprit, at least not directly.  Why
does CC Mode fontification code decide to scan the buffer backwards
from EOB, when point is at BOB, is a much more relevant question, so
it seems.
This bug report was last modified 11 years and 16 days ago.

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