From: Dmitry Gutov <dgutov@yandex.ru>
To: Eli Zaretskii <eliz@gnu.org>, Theodor Thornhill <theo@thornhill.no>
Cc: 43631@debbugs.gnu.org
Subject: bug#43631: 28.0.50; CC Mode multiline strings grinds performance to a halt
Date: Sat, 26 Sep 2020 22:43:05 +0300 [thread overview]
Message-ID: <ef04ad5e-a0a0-0cd6-8a22-1a224379a8da@yandex.ru> (raw)
In-Reply-To: <837dsgqzr1.fsf@gnu.org>
On 26.09.2020 19:17, Eli Zaretskii wrote:
> But I'm confused why the "fast" profile starts with
> font-lock-fontify-region, whereas the "slow" profile doesn't have
> font-lock-fontify-region anywhere...
Because CC Mode doesn't use syntax-propertize-function (most major modes
do, so we're used to seeing "slow" syntax analysis being done inside
font-lock-fontify-region because it calls s-p-f).
CC Mode applies syntax properties inside before/after-change-functions,
and the "slow" profile reflects that: c-before-change is featured
prominently.
next prev parent reply other threads:[~2020-09-26 19:43 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-26 11:17 bug#43631: 28.0.50; CC Mode multiline strings grinds performance to a halt Theodor Thornhill via Bug reports for GNU Emacs, the Swiss army knife of text editors
2020-09-26 11:41 ` Eli Zaretskii
2020-09-26 12:40 ` Theodor Thornhill via Bug reports for GNU Emacs, the Swiss army knife of text editors
2020-09-26 13:43 ` Eli Zaretskii
2020-09-26 16:03 ` Theodor Thornhill via Bug reports for GNU Emacs, the Swiss army knife of text editors
2020-09-26 16:17 ` Eli Zaretskii
2020-09-26 19:43 ` Dmitry Gutov [this message]
2020-09-27 9:54 ` Theodor Thornhill via Bug reports for GNU Emacs, the Swiss army knife of text editors
2020-09-27 11:34 ` Theodor Thornhill via Bug reports for GNU Emacs, the Swiss army knife of text editors
2020-09-28 19:33 ` Alan Mackenzie
2020-09-28 19:41 ` Theodor Thornhill via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-10-13 15:26 ` Alan Mackenzie
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