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bug#17404: Scrolling is painfully slow
From: |
Eli Zaretskii |
Subject: |
bug#17404: Scrolling is painfully slow |
Date: |
Tue, 06 May 2014 15:47:25 +0300 |
> Date: Tue, 06 May 2014 07:42:47 -0400
> From: Richard Stallman <rms@gnu.org>
> CC: 17404@debbugs.gnu.org
>
> I should explain that I configured Emacs to visit that file in Rmail mode.
> Try it that way.
I did. I used "C-u M-x rmail RET foo2.mail RET" in "emacs -Q". Does
that reproduce the problem on your system?
What about "emacs -nw" -- do you see the same slowdown there? Or is
the problem limited to the GUI sessions?
> I tried visiting it in 24.3.50.1 from May 1 2013.
Thanks, I'll try to see which change(s) could be responsible, but a
year is a lot in Emacs development, so if you could reduce the range,
it would help.
> Scrolling the file in Rmail mode is much faster in that version
> than in the current version. So is C-n.
How much more faster? Can you estimate the slowdown quantitatively?
> With find-file-literally it is almost instantaneous
> in both 24.3.50.1 and the current version.
find-file-literally disables bidirectional display, so it will always
result in faster redisplay.