From: Eli Zaretskii <eliz@gnu.org>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: psainty@orcon.net.nz, larsi@gnus.org, Emacs-hacker2018@jovi.net,
45898@debbugs.gnu.org
Subject: bug#45898: 27.1; wedged in redisplay again
Date: Wed, 22 Jun 2022 05:33:24 +0300 [thread overview]
Message-ID: <83mte5jukr.fsf@gnu.org> (raw)
In-Reply-To: <jwv4k0du57x.fsf-monnier+emacs@gnu.org> (message from Stefan Monnier on Tue, 21 Jun 2022 16:38:59 -0400)
> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: Lars Ingebrigtsen <larsi@gnus.org>, psainty@orcon.net.nz,
> Emacs-hacker2018@jovi.net, 45898@debbugs.gnu.org
> Date: Tue, 21 Jun 2022 16:38:59 -0400
>
> > One surprising finding is that sometimes syntactic fontifications
> > (triggered via jit-lock.el as part of rendering the buffer) seem to
> > run amok: jit-lock asks the mode's fontification to fontify a
> > 1500-character block, but that results in parse-partial-sexp being
> > called to parse the entire humongous file, BOB to EOB.
>
> IIUC the file is a single long-line. Font-lock works line-by-line (in
> theory major modes can override that by providing their own value for
> `font-lock-extend-region-functions`, but regexp-based fontification is
> hard to do with our regexp enging if not working line-by-line), so even
> if jit-lock only requests fontification of a 1500-char block, font-lock
> rounds it up to a whole number of lines (and then proceeds to call
> `parse-partial-sexp), which would explain what you're seeing.
Isn't there a way to limit what font-lock considers a "line" such that
it doesn't consider more than some number N of characters? What could
potentially happen if we set N to, like, 10,000 characters? Are you
saying that many regular expressions in font-lock-keywords are
anchored at beginning or end of a line?
And even if the regexp-based font-lock needs to do it line-by-line,
does it really _have_ to invoke parse-partial-sexp for the entire
line, when doing syntactical fontifications? why is that?
next prev parent reply other threads:[~2022-06-22 2:33 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-15 18:13 bug#45898: 27.1; wedged in redisplay again Devon Sean McCullough
2022-06-07 13:37 ` Lars Ingebrigtsen
2022-06-07 14:00 ` Eli Zaretskii
[not found] ` <b7f81bfc-bbfb-83bc-3660-d0b1474498f7@jovi.net>
2022-06-07 15:53 ` Eli Zaretskii
2022-06-08 11:47 ` Lars Ingebrigtsen
2022-06-08 14:08 ` Eli Zaretskii
2022-06-08 15:58 ` Eli Zaretskii
2022-06-09 10:30 ` Lars Ingebrigtsen
2022-06-09 10:45 ` Eli Zaretskii
2022-06-09 11:04 ` Lars Ingebrigtsen
2022-06-09 13:09 ` Eli Zaretskii
2022-06-09 13:36 ` Lars Ingebrigtsen
2022-06-09 15:56 ` Eli Zaretskii
2022-06-10 9:02 ` Lars Ingebrigtsen
2022-06-12 9:48 ` Eli Zaretskii
2022-06-12 10:23 ` Lars Ingebrigtsen
2022-06-12 14:23 ` Eli Zaretskii
2022-06-12 18:02 ` Eli Zaretskii
2022-06-13 12:10 ` Lars Ingebrigtsen
2022-06-13 12:57 ` Eli Zaretskii
2022-06-13 22:40 ` Phil Sainty
2022-06-14 12:45 ` Eli Zaretskii
2022-06-18 8:01 ` Eli Zaretskii
2022-06-20 11:58 ` Eli Zaretskii
2022-06-20 19:11 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-06-21 10:14 ` Eli Zaretskii
2022-06-21 20:38 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-06-22 2:33 ` Eli Zaretskii [this message]
2022-06-22 23:39 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-06-23 6:08 ` Eli Zaretskii
2022-06-23 21:14 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-06-24 7:57 ` Eli Zaretskii
2022-06-25 4:54 ` Gerd Möllmann
2022-06-25 6:29 ` Eli Zaretskii
2022-06-25 7:47 ` Eli Zaretskii
2022-06-25 8:18 ` Gerd Möllmann
2022-06-25 9:49 ` Gerd Möllmann
2022-06-25 9:57 ` Eli Zaretskii
2022-06-25 11:10 ` Gerd Möllmann
2022-06-25 11:29 ` Eli Zaretskii
2022-06-25 12:20 ` Gerd Möllmann
2022-06-25 12:54 ` Eli Zaretskii
2022-06-25 12:57 ` Gerd Möllmann
2022-06-29 16:18 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-06-29 19:07 ` Eli Zaretskii
2022-06-29 21:07 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-06-30 5:14 ` Eli Zaretskii
2022-06-30 17:22 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-06-30 18:35 ` Eli Zaretskii
2022-06-30 19:56 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-07-01 4:42 ` Gerd Möllmann
2022-07-01 6:04 ` Eli Zaretskii
2022-07-01 8:49 ` Gerd Möllmann
2022-07-01 10:31 ` Eli Zaretskii
2022-07-01 11:04 ` Gerd Möllmann
2022-07-01 11:12 ` Eli Zaretskii
2022-07-01 11:33 ` Gerd Möllmann
2022-07-01 11:44 ` Gerd Möllmann
2022-07-01 12:35 ` Gerd Möllmann
2022-07-01 12:56 ` Eli Zaretskii
2022-07-01 12:39 ` Eli Zaretskii
2022-07-01 5:27 ` Eli Zaretskii
2022-07-01 12:14 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-07-01 12:51 ` Eli Zaretskii
2022-07-01 14:38 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-07-01 15:43 ` Eli Zaretskii
2022-06-14 12:00 ` Lars Ingebrigtsen
2022-06-14 13:00 ` Eli Zaretskii
2022-06-09 10:25 ` Lars Ingebrigtsen
2022-06-09 10:40 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-06-09 10:41 ` Eli Zaretskii
2022-06-09 10:48 ` Lars Ingebrigtsen
2022-06-09 13:06 ` Eli Zaretskii
[not found] <165605725704.24125.17210424600068379407@vcs2.savannah.gnu.org>
[not found] ` <20220624075417.BFA82C0169C@vcs2.savannah.gnu.org>
[not found] ` <87wnd6v34k.fsf@gnus.org>
[not found] ` <83mte2coqg.fsf@gnu.org>
[not found] ` <87fsjuqpzi.fsf@gnus.org>
[not found] ` <83k096clsx.fsf@gnu.org>
[not found] ` <8735fup5oh.fsf@gnus.org>
[not found] ` <83a6a2cher.fsf@gnu.org>
[not found] ` <874k09nau4.fsf@gnus.org>
2022-06-25 7:17 ` Eli Zaretskii
2022-06-25 10:10 ` Lars Ingebrigtsen
2022-06-25 11:21 ` Eli Zaretskii
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=83mte5jukr.fsf@gnu.org \
--to=eliz@gnu.org \
--cc=45898@debbugs.gnu.org \
--cc=Emacs-hacker2018@jovi.net \
--cc=larsi@gnus.org \
--cc=monnier@iro.umontreal.ca \
--cc=psainty@orcon.net.nz \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.