From: "Perry E. Metzger" <perry@piermont.com>
To: Andreas Schwab <schwab@linux-m68k.org>
Cc: emacs-devel@gnu.org
Subject: Re: slowness scrolling in *Help* windows
Date: Mon, 8 Sep 2014 21:51:33 -0400 [thread overview]
Message-ID: <20140908215133.3edec847@jabberwock.cb.piermont.com> (raw)
In-Reply-To: <87mwaa7zu0.fsf@igel.home>
On Mon, 08 Sep 2014 20:05:11 +0200 Andreas Schwab
<schwab@linux-m68k.org> wrote:
> "Perry E. Metzger" <perry@piermont.com> writes:
>
> > I've been noticing that sometimes scrolling in *Help* gets very,
> > very slow sometimes. Typical case: C-h s (that is, view the
> > syntax table), and scroll through it, and it can take seconds for
> > the screen to do something after C-v
>
> Emacs needs to look up the fonts for the characters in the buffer.
> That can take some time depending on the number of installed fonts.
I can believe that this is part of the problem, but it seems like it
is anomalously long under the circumstances. It should not take
seconds on a modern processor to perform this action. Perhaps
something rather inefficient is going on, like a bad choice of a
search algorithm?
Perry
--
Perry E. Metzger perry@piermont.com
next prev parent reply other threads:[~2014-09-09 1:51 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-08 17:07 slowness scrolling in *Help* windows Perry E. Metzger
2014-09-08 18:05 ` Andreas Schwab
2014-09-09 1:51 ` Perry E. Metzger [this message]
2014-09-08 18:05 ` Drew Adams
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