Emacs becomes CPU-hungry after some runnig period.

Emacs becomes CPU-hungry after some runnig period.

[kostafey]

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After some running period (about 10-30 minutes) emacs needs
more and more CPU for simplest operations, like self-insert-command,
wich runs about a seciond.
Restarting solves this problem for some minutes.

This affects emacs 24.2.0 (both GTK and lucid) running on Linux
Munt and Ubuntu (from ppa:cassou/emacs).
The same version of emacs 24.2 running on Windows is free
of this problem.

emacs 24.3.50 (from the same ppa:cassou/emacs) is free of this problem too.
Even GTK version works quickly. Unfortunately, it is unstable yet.

Is it possible to solve this performance problem?

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Re: Emacs becomes CPU-hungry after some runnig period.

[kostafey]

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Official emacs 24.2 from http://ftp.gnu.org/pub/gnu/emacs/
built from source with GTK interface has the same problem.

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Re: Emacs becomes CPU-hungry after some runnig period.

[Peter Dyballa]

Am 27.01.2013 um 13:34 schrieb kostafey:

> emacs 24.3.50 (from the same ppa:cassou/emacs) is free of this problem too.
> Even GTK version works quickly. Unfortunately, it is unstable yet.

"Unstable" means that the code basis is still in development. And nothing else. The GNU Emacs 24.3.50 snapshots I used where mostly rock-steady. If not, then I could update the next day and had again a reliable tool.

You can also try the "pretest" of GNU Emacs 24.3: GNU Emacs 24.2.92, available as:

	ftp://alpha.gnu.org/gnu/emacs/pretest/emacs-24.2.92.tar.gz
	ftp://alpha.gnu.org/gnu/emacs/pretest/emacs-24.2.92.tar.xz

You'll need to configure, compile, and install yourself…

--
Greetings

  Pete

Let's face it; we don't want a free market economy either.
		– James Farley, president, Coca-Cola Export Corp., 1959

Re: Emacs becomes CPU-hungry after some runnig period.

[Michael Heerdegen]

kostafey <kostafey@gmail.com> writes:

> After some running period (about 10-30 minutes) emacs needs
> more and more CPU for simplest operations, like self-insert-command,
> wich runs about a seciond.
> Restarting solves this problem for some minutes.

Dunno why you see that problem.  When I faced such a slowness, most of
the time, there were too many markers or overlays existent in a buffer.

Does the phenomenon you describe appear in all buffers, or are only some
buffers affected?

Anyway, a good way to locate the cause of such problems is using
profiler.el, the Emacs's native profiler.

When the slowness begins, type M-x profiler-start and choose "cpu".
Perform some stuff affected, like self-insert-command or scrolling.
Then type M-x profiler-report.  You'll be presented a tree of functions
that were called, together with their cpu usage.  In your case, I guess
that redisplay_internal will have used most of the cpu time.  You can
expand parts of the tree if you put the cursor on the "+" and hit RET to
find out what stuff caused the slowness.


Michael.