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From: Henrik Enberg <henrik.enberg@telia.com>
Newsgroups: gmane.emacs.devel
Subject: Re: emacs hangs in jit-lock
Date: Thu, 30 Nov 2006 01:12:02 +0100
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Cc: Chong Yidong <cyd@stupidchicken.com>, emacs-devel@gnu.org
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Xref: news.gmane.org gmane.emacs.devel:63088
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Sam Steingold <sds@gnu.org> writes:
> Chong Yidong wrote:
> >If you provided a simple test case, I or someone else could take a
> >look at this problem.
> 
> I don't think this problem has a "simple test case".
> wget 
> http://clisp.cvs.sourceforge.net/*checkout*/clisp/clisp/src/lispbibl.d 

[...]

> http://clisp.cvs.sourceforge.net/*checkout*/clisp/clisp/emacs/d-mode.el
> 
> then load d-mode.el, associate d-mode with *.d, open all the *.d files 
> and try to edit, say, lispbibl.d close to the end of file.

I see the same thing.  The header file below is a simple way to test
it.  Just open it and hit C-v, and things will get very slow.

<http://www.openbsd.org/cgi-bin/cvsweb/~checkout~/src/usr.bin/mail/extern.h>

Setting jit-lock-stealth-time to nil makes the problem go away.