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bug#8890: 23.3; message writing slows emacs
From: |
Dave Abrahams |
Subject: |
bug#8890: 23.3; message writing slows emacs |
Date: |
Fri, 16 Sep 2011 11:11:56 -0400 |
User-agent: |
Gnus/5.110018 (No Gnus v0.18) Emacs/23.3 (darwin) |
on Fri Sep 16 2011, Stefan Monnier <monnier-AT-iro.umontreal.ca> wrote:
>>> "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.
>
> Indeed. The main problem with changing `message' is that if it is
> called too soon after the previous `message' we can't easily say "don't
> display this one" since there may not be any subsequent message coming,
> so we'd have to stash the last undisplayed message and then try and
> figure out good places/times to cause them to be displayed.
Well, the `obvious' good place/time is at next idle if no further
messages have come along to stomp on the previous one.
> 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.
--
Dave Abrahams
BoostPro Computing
http://www.boostpro.com
- bug#8890: 23.3; message writing slows emacs, (continued)
- bug#8890: 23.3; message writing slows emacs, Dave Abrahams, 2011/09/11
- bug#8890: 23.3; message writing slows emacs, Lars Magne Ingebrigtsen, 2011/09/11
- bug#8890: 23.3; message writing slows emacs, Eli Zaretskii, 2011/09/11
- bug#8890: 23.3; message writing slows emacs, Dave Abrahams, 2011/09/11
- bug#8890: 23.3; message writing slows emacs, Dave Abrahams, 2011/09/15
- bug#8890: 23.3; message writing slows emacs, Eli Zaretskii, 2011/09/16
- bug#8890: 23.3; message writing slows emacs, Lars Magne Ingebrigtsen, 2011/09/11
bug#8890: 23.3; message writing slows emacs, Stefan Monnier, 2011/09/16
- bug#8890: 23.3; message writing slows emacs, Eli Zaretskii, 2011/09/16
- bug#8890: 23.3; message writing slows emacs, Stefan Monnier, 2011/09/16
- bug#8890: 23.3; message writing slows emacs,
Dave Abrahams <=
- bug#8890: 23.3; message writing slows emacs, Lars Magne Ingebrigtsen, 2011/09/17
- bug#8890: 23.3; message writing slows emacs, Dave Abrahams, 2011/09/17
- bug#8890: 23.3; message writing slows emacs, Eli Zaretskii, 2011/09/17
- bug#8890: 23.3; message writing slows emacs, Lars Magne Ingebrigtsen, 2011/09/17
- bug#8890: 23.3; message writing slows emacs, Eli Zaretskii, 2011/09/17
- bug#8890: 23.3; message writing slows emacs, Juri Linkov, 2011/09/17
bug#8890: 23.3; message writing slows emacs, Stefan Monnier, 2011/09/17
bug#8890: 23.3; message writing slows emacs, Lars Magne Ingebrigtsen, 2011/09/18
bug#8890: 23.3; message writing slows emacs, Stefan Monnier, 2011/09/18
bug#8890: 23.3; message writing slows emacs, Lars Magne Ingebrigtsen, 2011/09/21