GNU bug report logs -
#8890
23.3; message writing slows emacs
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Reported by: Dave Abrahams <dave <at> boostpro.com>
Date: Sat, 18 Jun 2011 16:46:02 UTC
Severity: normal
Found in version 23.3
Fixed in version 29.1
Done: Lars Ingebrigtsen <larsi <at> gnus.org>
Bug is archived. No further changes may be made.
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Message #35 received at 8890 <at> debbugs.gnu.org (full text, mbox):
on Sun Sep 11 2011, Eli Zaretskii <eliz-AT-gnu.org> wrote:
>> From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
>
>> Cc: Eli Zaretskii <eliz <at> gnu.org>, 8890 <at> debbugs.gnu.org
>> Date: Sun, 11 Sep 2011 16:52:56 +0200
>>
>> Emacs does clever screen updates, though. So if the only thing that
>> changes is the number before the percentage, Emacs won't repaint the
>> entire line, I think?
>
> True. Like I said, redisplay of the echo area is very fast.
I don't think it's clever enough. Try this:
--8<---------------cut here---------------start------------->8---
(let (timings)
(dolist (reps '(1 10))
(let ((start-time (current-time)))
(loop for x to 10000 do
(loop repeat reps do
(message "message #%s" x)))
(push (time-subtract (current-time) start-time) timings)))
(message "%s" (mapcar 'time-to-seconds timings)))
--8<---------------cut here---------------end--------------->8---
I get (29.539774 2.514761)
I think this shows that it takes (more than) 10x as long to write out
the same message 10 times as it does to write it out once.
--
Dave Abrahams
BoostPro Computing
http://www.boostpro.com
This bug report was last modified 3 years and 45 days ago.
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