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bug#8890: 23.3; message writing slows emacs

From: Lars Magne Ingebrigtsen
Subject: bug#8890: 23.3; message writing slows emacs
Date: Sat, 17 Sep 2011 07:19:56 +0200
User-agent: Gnus/5.110018 (No Gnus v0.18) Emacs/24.0.50 (gnu/linux)

Dave Abrahams <address@hidden> writes:

>> So the general approach to fixing those problems is to say "use
>> progress-reporter-update" since this function has the advantage of
>> knowing that there will be a `progress-reporter-done' at some later
>> point, which allows it to skip a message without worries.
> Hm.  So there *is* a builtin functionality for this... well, that's
> good.  Sorry if I've wasted everyone's time on this.

I didn't know about progress-reporter, so my time wasn't wasted, at
least.  :-)

But I wonder whether a simpler, more general function would be
possible.  If we're outputting stuff that's not a percentage,
progress-reporter doesn't help much.

`message' could work as follows:

If it's been less than (say) 50th of a second since the previous
message, then don't message anything.  However, set up a timer in a
100th of a second's time to display that message -- if nothing else has
been displayed in the mean time.

The net effect will be that normal messaging (where it's been a long
time since the previous message) is displayed as usual, but when we
enter a "high-message" storm, we start skipping messages.  But we always
end up showing the final message, anyway.

This would be a very simple interface for programmers to deal with
(i.e., "don't worry about it"), and the user wouldn't notice anything in
particular -- other than Emacs being faster in some situations.

(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/

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