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From: Richard M Stallman <rms@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: open large file with C code: is it realy should be so slow?
Date: Mon, 05 Jan 2009 19:01:26 -0500
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I too find C mode painfully slow these days.  I wonder what changed to
make it so much slower than it was.  Perhaps the only relevant change
is that Font Lock is now enabled; I never used to enable it.  Even so,
it must make a lot of users unhappy.