From: Lennart Borgman <lennart.borgman@gmail.com>
To: Werner LEMBERG <wl@gnu.org>
Cc: acm@muc.de, schwab@linux-m68k.org, monnier@iro.umontreal.ca,
emacs-devel@gnu.org
Subject: Re: `make-overlay' very slow
Date: Sat, 11 Apr 2009 09:34:35 +0200 [thread overview]
Message-ID: <e01d8a50904110034q6e9da02hea536bf0e54b8d6@mail.gmail.com> (raw)
In-Reply-To: <20090411.081150.169736792.wl@gnu.org>
On Sat, Apr 11, 2009 at 8:11 AM, Werner LEMBERG <wl@gnu.org> wrote:
>> overlays have a poor algorithmic behavior (many operations take a
>> time proportional to the number of overlays in the buffer). Better
>> use text-properties (which are implemented with a tree and should
>> provide something closer to O(log N) complexity instead).
>
> I did that (see attachment for reference), and it really works at a
> reasonable speed. However, it is the completely wrong concept since
> it sets the `modified' flag and stores undo information,
There is a macro in font-lock.el that you can use to modify text
properties without storing undo information or setting the modified
flag.
> and it fails
> with modes which use the `invisible' and `intangible' properties.
next prev parent reply other threads:[~2009-04-11 7:34 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-02 6:52 hiding lines Werner LEMBERG
2009-04-02 19:30 ` Alan Mackenzie
2009-04-03 0:39 ` Stefan Monnier
2009-04-03 12:26 ` Alan Mackenzie
2009-04-03 13:22 ` Stefan Monnier
2009-04-06 6:11 ` Werner LEMBERG
2009-04-06 13:10 ` Stefan Monnier
2009-04-06 16:20 ` Werner LEMBERG
2009-04-07 0:50 ` Stefan Monnier
2009-04-07 5:26 ` Werner LEMBERG
2009-04-10 19:54 ` Werner LEMBERG
2009-04-10 20:42 ` Andreas Schwab
2009-04-10 21:50 ` Werner LEMBERG
2009-04-10 22:42 ` `make-overlay' very slow (was: hiding lines) Werner LEMBERG
2009-04-10 23:36 ` `make-overlay' very slow Stefan Monnier
2009-04-11 6:11 ` Werner LEMBERG
2009-04-11 7:34 ` Lennart Borgman [this message]
2009-04-11 7:45 ` Werner LEMBERG
2009-04-11 7:46 ` Lennart Borgman
2009-04-11 8:33 ` Werner LEMBERG
2009-04-11 8:55 ` Eli Zaretskii
2009-04-11 12:51 ` Stefan Monnier
2009-04-14 12:03 ` Kenichi Handa
2009-04-14 13:03 ` Stefan Monnier
2009-04-14 21:15 ` Richard M Stallman
2009-04-15 3:56 ` Kenichi Handa
2009-04-16 15:02 ` clone-indirect-buffer-hook should be make-indirect-buffer-hook klaus.berndl
2009-04-03 5:44 ` hiding lines Andreas Roehler
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