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Re: [O] Re: Slow movement in large buffers
From: |
Carsten Dominik |
Subject: |
Re: [O] Re: Slow movement in large buffers |
Date: |
Tue, 15 Mar 2011 18:42:01 +0100 |
On 15.3.2011, at 15:09, Eric S Fraga wrote:
> Hello,
>
> following up on this issue, I have just run into it again. I'm editing
> a not very large document and suddenly things slowed down, mostly but
> not exclusively for "next-line":
>
> --8<---------------cut here---------------start------------->8---
> next-line 18
> 2.1547069999 0.1197059444
> previous-line 19
> 0.4066669999 0.0214035263
> org-mode-flyspell-verify 16
> 5.299...e-05 3.312...e-06
> --8<---------------cut here---------------end--------------->8---
>
> This happened when I started a new source code block (gnuplot, to be
> exact) but didn't type in the end_src line for a while. The problem
> seems to be due to font-locking and it tries to font-lock the whole
> document initially. When I eventually get around to typing the end_src
> line, it font-locks correctly but things are slow thereafter. There
> seems to be some hysteresis loop in the code...
This sounds like a bug that needs to be fixed in the block fontifications,
maybe a limit for how far to search for the end line. regular expressions
that match many lines need to be carefully constructed - there are possible
backtracking traps that can make the matching time scale as the number of
characters squared.
- Carsten
>
> If I kill the buffer and reload the file, everything is fine.
>
> --8<---------------cut here---------------start------------->8---
> next-line 17
> 0.0655900000 0.0038582352
> previous-line 17
> 0.0115249999 0.0006779411
> org-mode 1
> 0.007178 0.007178
> org-fontify-meta-lines-and-blocks 25
> 0.0022920000 9.168...e-05
> org-set-startup-visibility 1
> 0.001619 0.001619
> org-raise-scripts 25
> 0.0013889999 5.555...e-05
> --8<---------------cut here---------------end--------------->8---
>
> Dramatic difference!
>
> --
> : Eric S Fraga (GnuPG: 0xC89193D8FFFCF67D) in Emacs 24.0.50.1
> : using Org-mode version 7.5 (release_7.5.38.gf8c6.dirty)
>
- [O] Slow movement in large buffers, Matt Lundin, 2011/03/14
- Re: [O] Slow movement in large buffers, Carsten Dominik, 2011/03/15
- Re: [O] Slow movement in large buffers, Lawrence Mitchell, 2011/03/15
- [O] Re: Slow movement in large buffers, Matt Lundin, 2011/03/15
- Re: [O] Slow movement in large buffers, Nick Dokos, 2011/03/15
- [O] Re: Slow movement in large buffers, Matt Lundin, 2011/03/15
- [O] Re: Slow movement in large buffers, Carsten Dominik, 2011/03/15
- Re: [O] Re: Slow movement in large buffers, Christian Moe, 2011/03/15
- Re: [O] Re: Slow movement in large buffers, Nick Dokos, 2011/03/15
- Re: [O] Re: Slow movement in large buffers, Christian Moe, 2011/03/15
- Re: [O] Re: Slow movement in large buffers, Nick Dokos, 2011/03/15