GNU bug report logs - #25706
26.0.50; Slow C file fontification

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Packages: emacs, cc-mode;

Reported by: Sujith <m.sujith <at> gmail.com>

Date: Mon, 13 Feb 2017 18:41:01 UTC

Severity: normal

Tags: moreinfo

Found in version 26.0.50

Done: Alan Mackenzie <acm <at> muc.de>

Bug is archived. No further changes may be made.

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From: Mattias Engdegård <mattiase <at> acm.org>
To: Ravine Var <ravine.var <at> gmail.com>
Cc: Alan Mackenzie <acm <at> muc.de>, Lars Ingebrigtsen <larsi <at> gnus.org>, 25706 <at> debbugs.gnu.org
Subject: bug#25706: 26.0.50; Slow C file fontification
Date: Tue, 1 Dec 2020 14:34:58 +0100

1 dec. 2020 kl. 06.48 skrev Ravine Var <ravine.var <at> gmail.com>:

> Will this patch fix the problem with big header files like
> the one originally reported ?

Unfortunately it seems that my benchmarking approach was misleading; see my previous reply to Alan. Sorry about that.
The patch helps a bit but not nearly enough, so for big header files like the ones you mention in the asic_reg directory, it may not make much of a difference.

It is obviously worthwhile, but again as Alan noted, the incremental fontifying cost increases with distance from the start of the file (absent any actual code other than preprocessor definitions), leading to the observed superlinear behaviour. More robust heuristics needed.
This bug report was last modified 4 years and 213 days ago.

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