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bug#56393: Actually fix the long lines display bug
From: |
Eli Zaretskii |
Subject: |
bug#56393: Actually fix the long lines display bug |
Date: |
Sat, 09 Jul 2022 14:59:35 +0300 |
> Date: Sat, 09 Jul 2022 11:48:27 +0000
> From: Gregory Heytings <gregory@heytings.org>
> cc: gerd.moellmann@gmail.com, larsi@gnus.org, 56393@debbugs.gnu.org
>
> >> But fontification-functions are not the only problem here. What I also
> >> observe is that, for example, moving in a fontified buffer takes (much)
> >> longer than moving in a non-fontified buffer. For example, in
> >> long-line.xml, vertical-motion takes about 40 ms backward and 10 ms
> >> forward in a non-fontified buffer, and about 180 ms backward and 40 ms
> >> forward in a fontified buffer.
> >
> > I guess that's because vertical-motion calls the display code, and that
> > calls fontification-functions.
> >
>
> No, fontification-functions are not called when moving around in an
> already fontified portion of the buffer. So the slowdown of C-n and C-p
> (and others) in that case is not caused by fontification-functions.
That's very strange, since AFAIK moving in a non-fontified buffer
involves both fontifications and display of the fontified text,
whereas moving through a fontified buffer involves only the latter.
FWIW, I've _never_ seen movement through fontified buffer being slower
than in a non-fontified one. I'd be very interested to know what
slows down the movement in a fontified buffer.
- bug#56393: Actually fix the long lines display bug, (continued)
- bug#56393: Actually fix the long lines display bug, Eli Zaretskii, 2022/07/09
- bug#56393: Actually fix the long lines display bug, Gregory Heytings, 2022/07/09
- bug#56393: Actually fix the long lines display bug, Eli Zaretskii, 2022/07/09
- bug#56393: Actually fix the long lines display bug, Gregory Heytings, 2022/07/09
- bug#56393: Actually fix the long lines display bug, Eli Zaretskii, 2022/07/09
- bug#56393: Actually fix the long lines display bug, Gregory Heytings, 2022/07/09
- bug#56393: Actually fix the long lines display bug,
Eli Zaretskii <=
- bug#56393: Actually fix the long lines display bug, Ihor Radchenko, 2022/07/09
- bug#56393: Actually fix the long lines display bug, Eli Zaretskii, 2022/07/09
- bug#56393: Actually fix the long lines display bug, Gregory Heytings, 2022/07/09
- bug#56393: Actually fix the long lines display bug, Eli Zaretskii, 2022/07/09
- bug#56393: Actually fix the long lines display bug, Gregory Heytings, 2022/07/09
- bug#56393: Actually fix the long lines display bug, Eli Zaretskii, 2022/07/09
- bug#56393: Actually fix the long lines display bug, Eli Zaretskii, 2022/07/09
- bug#56393: Actually fix the long lines display bug, Gregory Heytings, 2022/07/09
- bug#56393: Actually fix the long lines display bug, Gregory Heytings, 2022/07/09
- bug#56393: Actually fix the long lines display bug, Lars Ingebrigtsen, 2022/07/09