unofficial mirror of bug-gnu-emacs@gnu.org 
 help / color / mirror / code / Atom feed
From: Eli Zaretskii <eliz@gnu.org>
To: 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 19:17:06 +0300	[thread overview]
Message-ID: <837dsgqzr1.fsf@gnu.org> (raw)
In-Reply-To: <877dsgle4h.fsf@thornhill.no> (message from Theodor Thornhill on Sat, 26 Sep 2020 18:03:10 +0200)

> From: Theodor Thornhill <theo@thornhill.no>
> Cc: 43631@debbugs.gnu.org
> Date: Sat, 26 Sep 2020 18:03:10 +0200
> 
> > Thanks, but please post the text of Profiler-Report buffer, not the
> > internal structure it produces.
> 
> Ok, third time's the charm:

Thanks.  This seems to indicate that this loop in
c-pps-to-string-delim is the culprit:

    (while (progn
	     (parse-partial-sexp (point) end nil nil st-s 'syntax-table)
	     (unless (bobp)
	       (c-clear-syn-tab (1- (point))))
	     (setq st-pos (point))
	     (and (< (point) end)
		  (not (eq (char-before) ?\")))))

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...

Hopefully, Alan can take it from here.





  reply	other threads:[~2020-09-26 16:17 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 [this message]
2020-09-26 19:43           ` Dmitry Gutov
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

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

  List information: https://www.gnu.org/software/emacs/

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=837dsgqzr1.fsf@gnu.org \
    --to=eliz@gnu.org \
    --cc=43631@debbugs.gnu.org \
    --cc=theo@thornhill.no \
    /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 public inbox

	https://git.savannah.gnu.org/cgit/emacs.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).