From: David Kastrup <dak@gnu.org>
Cc: rms@gnu.org, emacs-devel@gnu.org
Subject: Re: C-n is very slow in Font-Lock mode
Date: Tue, 26 Apr 2005 23:38:11 +0200 [thread overview]
Message-ID: <85mzrlgqws.fsf@lola.goethe.zz> (raw)
In-Reply-To: <01c54a8a$Blat.v2.4$9d6aeda0@zahav.net.il> (Eli Zaretskii's message of "Tue, 26 Apr 2005 21:05:03 +0300")
"Eli Zaretskii" <eliz@gnu.org> writes:
>> From: Richard Stallman <rms@gnu.org>
>> CC: emacs-devel@gnu.org
>> Date: Tue, 26 Apr 2005 06:05:41 -0400
>>
>> > It turns out that vertical-motion was fontifying all the text that
>> > it moved over. That seems to be easy to fix.
>>
>> Did you try my suggestion of customizing jit-lock-defer-time?
>>
>> No, because I want to fix this, not work around it. vertical-motion
>> is a cursor motion function. It should not fontify anything.
>
> As David pointed out, vertical-motion does that for a good reason:
> fontification can well change the pixel size of the glyphs that Emacs
> needs to display.
>
> I think jit-lock-defer-time _is_ the way to avoid the slowness if
> you are willing to see the text unfontified for a fraction of a
> second.
I think that a separate value of 0 where is one not willing to see
text unfontified, but willing to have motion calculated with a still
unfontified text, would make perfect sense.
It might be that jit-lock-defer-time already happens to work this
way. If not, it probably should, and 0 instead of nil should be the
default value.
--
David Kastrup, Kriemhildstr. 15, 44793 Bochum
next prev parent reply other threads:[~2005-04-26 21:38 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-23 16:16 C-n is very slow in Font-Lock mode Richard Stallman
2005-04-23 20:17 ` Eli Zaretskii
2005-04-24 21:23 ` Richard Stallman
2005-04-24 21:50 ` Eli Zaretskii
2005-04-26 10:05 ` Richard Stallman
2005-04-26 10:27 ` David Kastrup
2005-04-26 22:56 ` Richard Stallman
2005-04-27 8:59 ` Kim F. Storm
2005-04-27 9:57 ` Eli Zaretskii
2005-04-27 12:27 ` Kim F. Storm
2005-04-27 9:06 ` Eli Zaretskii
2005-04-28 11:00 ` Richard Stallman
2005-04-26 18:05 ` Eli Zaretskii
2005-04-26 21:38 ` David Kastrup [this message]
2005-04-26 22:43 ` Eli Zaretskii
2005-04-26 22:57 ` David Kastrup
2005-04-27 9:19 ` Eli Zaretskii
2005-04-27 9:43 ` David Kastrup
2005-04-27 10:17 ` Eli Zaretskii
2005-04-27 11:32 ` David Kastrup
2005-04-27 11:59 ` Eli Zaretskii
2005-04-27 12:23 ` David Kastrup
2005-04-27 12:32 ` Kim F. Storm
2005-04-28 11:00 ` Richard Stallman
2005-04-28 12:16 ` David Kastrup
2005-04-28 11:00 ` Richard Stallman
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