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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.help
Subject: Re: Q: High processor load with change to GNU Emacs 22 under Windows
Date: Sat, 06 Oct 2007 10:06:26 +0200
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In-reply-to: <fe6cjk$14p$1@nienor.home-net.stg> (message from Torsten Zirzlaff
	on Sat, 06 Oct 2007 00:07:48 +0200)
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> From: Torsten Zirzlaff <zirzlaff@nienor.s.bawue.de>
> Date: Sat, 06 Oct 2007 00:07:48 +0200
> 
>    If I open a C or C++ file in Emacs 22 I encounter a very high
> workload. On a single porcessor system GNU Emacs uses 100%
> of the CPU while I do nothing. If I <Ctrl>+g I stops shortly
> and starts again. On a multiprocessor system it uses up a
> complete CPU. This only happens if I load a C/C++ file.

Does the problem go away if you start Emacs with "emacs -Q", and then
open a C/C++ file?  If so, maybe you load in your .emacs some optional
package that causes this problem.