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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on Fri Sep 16 2011, Eli Zaretskii <eliz-AT-gnu.org> wrote:
>> From: Stefan Monnier <monnier <at> iro.umontreal.ca>
>
>> Date: Fri, 16 Sep 2011 09:18:51 -0400
>> Cc: 8890 <at> debbugs.gnu.org
>>
>> "A few milliseconds" sounds negligible, but if it's done at every
>> iteration of a loop whose body takes less than a millisecond to run
>> (we can do a lot of work in a millisecond on today's machines), then
>> it's a major slowdown.
>
> Then programmers who run those loops should update the progress less
> aggressively. Redisplay (and infrastructure in general) lack the
> context that would allow them to make good decisions as to when defer
> repeated display. Only the calling application can know that.
There's a middle path: provide a `progress-message' function. That
allows the caller to provide the semantic context that this particular
message isn't critical without burdening every single application with
building its own throttling updater.
--
Dave Abrahams
BoostPro Computing
http://www.boostpro.com
This bug report was last modified 3 years and 45 days ago.
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