From: Eli Zaretskii <eliz@gnu.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 13675@debbugs.gnu.org
Subject: bug#13675: 24.2.93; Extremely slow redisplay when lines are very long
Date: Sun, 10 Feb 2013 19:36:30 +0200 [thread overview]
Message-ID: <83pq085aw1.fsf@gnu.org> (raw)
In-Reply-To: <83sj545e55.fsf@gnu.org>
> Date: Sun, 10 Feb 2013 18:26:14 +0200
> From: Eli Zaretskii <eliz@gnu.org>
>
> This is a very long-standing deficiency of the Emacs display engine:
> it is awfully slow in buffers with very long (thousands of characters)
> lines. Specifically, many simple movement commands, scrolling, or
> even typing "M-x" can take several seconds(!) to complete.
>
> A simple Awk script attached below can be used to generate such files.
>
> For the latest discussions of this and some data, see this thread:
>
> http://lists.gnu.org/archive/html/emacs-devel/2013-02/msg00135.html
>
> The solution for this bug should produce algorithmic changes in the
> display engine and possibly also supporting changes in data structures
> that would prevent such a terrible slow-down with long lines.
> Ideally, redisplay of such buffers should not be much slower than
> buffers with "normal" line length.
Revision 111724 speeds up some of the redisplay operations by a factor
of 3.
next prev parent reply other threads:[~2013-02-10 17:36 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-10 16:26 bug#13675: 24.2.93; Extremely slow redisplay when lines are very long Eli Zaretskii
2013-02-10 17:36 ` Eli Zaretskii [this message]
2017-10-20 1:45 ` bug#13675: " Mark Diekhans
2017-10-20 6:44 ` Eli Zaretskii
2017-10-20 11:57 ` Phil Sainty
2017-10-21 2:03 ` Phil Sainty
2017-10-20 15:50 ` Mark Diekhans
2017-10-20 16:10 ` 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=83pq085aw1.fsf@gnu.org \
--to=eliz@gnu.org \
--cc=13675@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 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.