GNU bug report logs - #15011
24.3; Scrolling Performance

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Packages: emacs, cc-mode;

Reported by: "Calkins, Chad M" <chad.calkins <at> intergraph.com>

Date: Fri, 2 Aug 2013 20:03:01 UTC

Severity: normal

Found in version 24.3

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Message #17 received at 15011 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Drew Adams <drew.adams <at> oracle.com>
Cc: 15011 <at> debbugs.gnu.org, gundaetiapo <at> gmail.com
Subject: Re: bug#15011: 24.3; Scrolling Performance
Date: Sat, 03 Aug 2013 11:09:32 +0300

> Date: Fri, 2 Aug 2013 16:21:38 -0700 (PDT)
> From: Drew Adams <drew.adams <at> oracle.com>
> 
> > Scrolling is known to be slow in C++ files without some performance
> > tunes. I use these two customizations myself:
> > 
> >  '(font-lock-maximum-decoration (quote ((c++-mode . 2))))
> >  '(jit-lock-defer-time 0.01)
> 
> Should settings such as these be turned on by default in C++ mode?

The 2nd one causes fast scrolling (e.g., lean on the "C-v" key)
refrain from fontification, so you see unfontified text scrolling past
you.  Therefore, I'd advise against such default.
This bug report was last modified 11 years and 316 days ago.

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