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From: | Andreas Röhler |
Subject: | bug#24012: 25.0.95; forward-comment backwards takes O(n^2) |
Date: | Sun, 17 Jul 2016 15:39:17 +0200 |
User-agent: | Mozilla/5.0 (X11; Linux i686; rv:45.0) Gecko/20100101 Icedove/45.1.0 |
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
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