From: "Andreas Röhler" <andreas.roehler@easy-emacs.de>
To: 24012@debbugs.gnu.org
Subject: bug#24012: 25.0.95; forward-comment backwards takes O(n^2)
Date: Sun, 17 Jul 2016 15:39:17 +0200 [thread overview]
Message-ID: <f2b552fa-c7b1-0b4d-8a29-cba6251dcee2@easy-emacs.de> (raw)
In-Reply-To: <m1h9boh6fh.fsf@gmail.com>
On 17.07.2016 13:04, Leo Liu wrote:
> 1. Use the attached file as an example, open it in emacs in ruby-mode
> 2. Move point to end of buffer and eval (forward-comment (- (point)))
>
> The last step takes about 0.25 seconds on my MacBook 3 GHz Intel Core
> i7. If you double the lines of comments, the time increase by 4 folds.
>
> Any idea why forward-comment backwards is so slow?
>
> Leo
>
With last line
### @end (forward-comment (- (point)))
evaluation last expression doesn't move backward at all, returns nil
GNU Emacs 25.0.95.1 (i686-pc-linux-gnu, GTK+ Version 3.14.5) of 2016-06-12
next prev parent reply other threads:[~2016-07-17 13:39 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-17 11:04 bug#24012: 25.0.95; forward-comment backwards takes O(n^2) Leo Liu
2016-07-17 12:12 ` Eli Zaretskii
2016-07-18 0:15 ` Leo Liu
2016-07-18 2:36 ` Eli Zaretskii
2016-07-18 3:05 ` Leo Liu
2016-07-18 14:34 ` Eli Zaretskii
2016-07-17 13:39 ` Andreas Röhler [this message]
2017-12-25 15:24 ` Dmitry Gutov
2019-09-29 5:15 ` Stefan Kangas
2019-11-08 3:59 ` Stefan Kangas
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