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bug#56682: Fix the long lines font locking related slowdowns
From: |
Eli Zaretskii |
Subject: |
bug#56682: Fix the long lines font locking related slowdowns |
Date: |
Thu, 04 Aug 2022 19:00:27 +0300 |
> Date: Thu, 04 Aug 2022 15:08:07 +0000
> From: Gregory Heytings <gregory@heytings.org>
> cc: gerd.moellmann@gmail.com, 56682@debbugs.gnu.org,
> monnier@iro.umontreal.ca,
> dgutov@yandex.ru
>
> For example C-p, C-n, C-v, M-v. C-f and C-b also, but much less so.
>
> For example, open the file and do M-g c 70000 RET. This took about 5
> seconds. Now do C-n, this again took about 5 seconds. With the
> optimizations, M-g c 70000 RET is almost immediate, and C-n there takes
> less than a second.
I'm on the branch, so I am _after_ the optimizations. I thought you
said even after that the navigation is sluggish. I see somewhat
slower response than in "normal" files, but my build is unoptimized,
so where it takes 3 or 4 seconds, and optimized build should be almost
instantaneous. And that looks good enough to me, since being a bit
slower in such files is IMO fine.
> But you're right, this slowdown has little to do with bidi. A file with a
> sufficiently long single line of Arabic text has the same problem. (But
> not one with a line of Hebrew text.)
OK. Text that goes through character compositions is expected to be
slower in redisplay, because character composition in Emacs works by
calling into Lisp. So I think we are good here, do you agree?
- bug#56682: Fix the long lines font locking related slowdowns, (continued)
- bug#56682: Fix the long lines font locking related slowdowns, Gregory Heytings, 2022/08/04
- bug#56682: Fix the long lines font locking related slowdowns, Eli Zaretskii, 2022/08/04
- bug#56682: Fix the long lines font locking related slowdowns, Gregory Heytings, 2022/08/04
- bug#56682: Fix the long lines font locking related slowdowns, Eli Zaretskii, 2022/08/04
- bug#56682: Fix the long lines font locking related slowdowns, Gregory Heytings, 2022/08/04
- bug#56682: Fix the long lines font locking related slowdowns, Eli Zaretskii, 2022/08/04
- bug#56682: Fix the long lines font locking related slowdowns, Eli Zaretskii, 2022/08/04
- bug#56682: Fix the long lines font locking related slowdowns, Eli Zaretskii, 2022/08/04
- bug#56682: Fix the long lines font locking related slowdowns, Gregory Heytings, 2022/08/04
- bug#56682: Fix the long lines font locking related slowdowns, Gregory Heytings, 2022/08/04
- bug#56682: Fix the long lines font locking related slowdowns,
Eli Zaretskii <=
- bug#56682: Fix the long lines font locking related slowdowns, Gregory Heytings, 2022/08/04
- bug#56682: Fix the long lines font locking related slowdowns, Eli Zaretskii, 2022/08/04
- bug#56682: Fix the long lines font locking related slowdowns, Gregory Heytings, 2022/08/04
- bug#56682: Fix the long lines font locking related slowdowns, Eli Zaretskii, 2022/08/04
- bug#56682: Fix the long lines font locking related slowdowns, Gregory Heytings, 2022/08/04
- bug#56682: Fix the long lines font locking related slowdowns, Eli Zaretskii, 2022/08/05
- bug#56682: Fix the long lines font locking related slowdowns, Gregory Heytings, 2022/08/05
- bug#56682: Fix the long lines font locking related slowdowns, Eli Zaretskii, 2022/08/05
- bug#56682: Fix the long lines font locking related slowdowns, Gregory Heytings, 2022/08/05
- bug#56682: Fix the long lines font locking related slowdowns, Eli Zaretskii, 2022/08/05