From: Dmitry Gutov <dgutov@yandex.ru>
To: 57245@debbugs.gnu.org
Subject: bug#57245: 29.0.50; M-> in a large XML file (without long lines) is slow
Date: Tue, 16 Aug 2022 17:33:58 +0300 [thread overview]
Message-ID: <18035574-1b50-62f4-7605-8cdb33204535@yandex.ru> (raw)
Branching this off from the discussion in bug#56682.
Prerequisite: Have an XML file that is 20 MB in size, and doesn't have
long lines.
Or follow steps 1-3 to create one.
1. wget -o large-file.xml
https://updates.drupal.org/release-history/drupal/current
2. M-% /> RET ^J/> RET (to break up the long line into smaller pieces)
3. Select the contents of the file and copy them over and over for 99
times. Alternatively, copy them 9 times, then select the result, and
copy it 9 times as well. Save the buffer.
(To try to keep XML valid -- not sure if necessary -- you can only
perform the copying operation on the contents of the <releases> tag. But
that's probably not important. I did that, though.)
4. Kill the buffer and re-visit it again. Press M->.
5. Note the delay.
Here's the profiler output:
1397 95% - command-execute
1397 95% - call-interactively
1338 91% - funcall-interactively
1331 90% - end-of-buffer
1327 90% - recenter
1327 90% - jit-lock-function
1327 90% - jit-lock-fontify-now
1327 90% - jit-lock--run-functions
1327 90% - run-hook-wrapped
1327 90% - #<compiled -0x14ecf3ff276f01c3>
1327 90% - font-lock-fontify-region
1327 90% - font-lock-default-fontify-region
1327 90% - nxml-extend-region
845 57% - skip-syntax-forward
845 57% - internal--syntax-propertize
845 57% - syntax-propertize
845 57% - nxml-syntax-propertize
845 57% - sgml-syntax-propertize
842 57% - #<compiled 0x1894bdc3ad4ca90>
479 32% sgml--syntax-propertize-ppss
3 0% syntax-ppss
482 32% - nxml-move-outside-backwards
482 32% - nxml-inside-start
482 32% syntax-ppss
7 0% + execute-extended-command
59 4% + byte-code
59 4% + ...
10 0% + timer-event-handler
In GNU Emacs 29.0.50 (build 3, x86_64-pc-linux-gnu, GTK+ Version
3.24.20, cairo version 1.16.0)
of 2022-08-16 built on potemkin
Repository revision: 81ff64d3ca8d6e43e976f209399d2a0e9b4a7dd8
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12013000
System Description: Ubuntu 20.04.4 LTS
next reply other threads:[~2022-08-16 14:33 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-16 14:33 Dmitry Gutov [this message]
2022-08-16 16:54 ` bug#57245: 29.0.50; M-> in a large XML file (without long lines) is slow Eli Zaretskii
2022-08-16 18:40 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-08-16 18:59 ` Eli Zaretskii
2022-08-16 19:32 ` Dmitry Gutov
2022-08-16 20:22 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-08-16 20:49 ` Dmitry Gutov
2022-08-16 21:45 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-08-16 22:20 ` Dmitry Gutov
2022-08-17 11:36 ` Eli Zaretskii
2022-08-17 11:46 ` Dmitry Gutov
2022-08-17 12:16 ` Eli Zaretskii
2022-08-17 12:30 ` Dmitry Gutov
2022-08-17 12:33 ` Eli Zaretskii
2022-08-17 12:46 ` Dmitry Gutov
2022-08-17 11:24 ` Eli Zaretskii
2022-08-17 12:14 ` Dmitry Gutov
2022-08-17 12:20 ` Eli Zaretskii
2022-08-17 12:40 ` Dmitry Gutov
2022-08-17 13:20 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
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=18035574-1b50-62f4-7605-8cdb33204535@yandex.ru \
--to=dgutov@yandex.ru \
--cc=57245@debbugs.gnu.org \
/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).