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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: Handling large files with Emacs
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> From: Tom <adatgyujto@gmail.com>
> Date: Wed, 24 Oct 2012 09:40:18 +0000 (UTC)
> 
> Jambunathan K <kjambunathan <at> gmail.com> writes:
> 
> > 
> > Have you experimented with `font-lock-maximum-size' together with
> > `font-lock-support-mode'?
> > 
> > ,----[ C-h v font-lock-maximum-size RET ]
> > | font-lock-maximum-size is a variable defined in `font-lock.el'.
> > | Its value is 256000
> > | 
> > |   This variable is obsolete since 24.1.
> > | 
> 
> BTW, why is it obsolete? Does it mean it's unnecessary and the 
> size of the buffer should not be a problem?

Yes.