From: Richard Stallman <rms@gnu.org>
Cc: romain@orebokech.com, emacs-devel@gnu.org
Subject: Re: Very long lines in shell-mode
Date: Wed, 06 Dec 2006 23:59:33 -0500 [thread overview]
Message-ID: <E1GsBM5-00026X-Jm@fencepost.gnu.org> (raw)
In-Reply-To: <jwvejrcc336.fsf-monnier+emacs@gnu.org> (message from Stefan Monnier on Wed, 06 Dec 2006 13:10:49 -0500)
Most likely the 2MB line will be inserted in the buffer in many little
chunks of maybe 4KB or so: for each chunk font-lock may decide to refontify
the whole line. Each fontification step takes time proportional to the
length of the line, so you get O(n^2) behavior.
And this is without even considering the regexps involved which may very
likely add a factor of n to that.
Maybe for such cases, font-lock should have a "sanity check" and either not
fontify the line at all, or fontify only a part of it at a time.
A possible simple solution: in Shell mode, don't fontify a line that
doesn't end in a newline. If that solves the problem, it would be
simple enough to install now.
next prev parent reply other threads:[~2006-12-07 4:59 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-06 17:44 Very long lines in shell-mode Romain Francoise
2006-12-06 18:10 ` Stefan Monnier
2006-12-07 4:59 ` Richard Stallman [this message]
2006-12-07 9:23 ` Kim F. Storm
2006-12-08 5:04 ` Richard Stallman
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=E1GsBM5-00026X-Jm@fencepost.gnu.org \
--to=rms@gnu.org \
--cc=emacs-devel@gnu.org \
--cc=romain@orebokech.com \
/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.