From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Glenn Morris <rgm@gnu.org>
Cc: 14259@debbugs.gnu.org
Subject: bug#14259: 24.1; global-linum-mode slows down scrolling and user input in DocView
Date: Wed, 24 Apr 2013 14:47:02 -0400 [thread overview]
Message-ID: <jwvehdz3h90.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <754nevvpj5.fsf@fencepost.gnu.org> (Glenn Morris's message of "Wed, 24 Apr 2013 12:53:18 -0400")
> 2. Open a PDF that has pages you can scroll
[...]
> 5. Ensure the global-linum-mode is enabled and now scroll around/change
> pages/etc. There should be a noticeable lag that makes it very hard to use
Indeed, I can reproduce it, and it's not just a "noticeable lag" for me,
it's so dog slow that it makes you feel like Emacs is failing to respond.
> Does it help to use nlinum from GNU ELPA instead?
Yes, it's much faster. With nlinum-mode, there is still a slowdown
(slightly more noticeable for horizontal scrolls than vertical scrolls),
but it's much less severe.
You can see the exact same slow down if you just do:
M-: (set-window-margins (selected-window) 2) RET
So the performance cost doesn't come from nlinum-mode.
As for linum-mode, I'm not sure where the performance problem lies.
Stefan
next prev parent reply other threads:[~2013-04-24 18:47 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-24 10:24 bug#14259: 24.1; global-linum-mode slows down scrolling and user input in DocView James Hudon
2013-04-24 16:53 ` Glenn Morris
2013-04-24 18:47 ` Stefan Monnier [this message]
2013-04-24 20:57 ` James Hudon
2020-08-21 14:06 ` Stefan Kangas
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