GNU bug report logs - #26051
25.1; overlays may make emacs very slow

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Package: emacs;

Reported by: ynyaaa <at> gmail.com

Date: Fri, 10 Mar 2017 16:26:02 UTC

Severity: minor

Merged with 2963

Found in version 25.1

Done: Stefan Kangas <stefankangas <at> gmail.com>

Bug is archived. No further changes may be made.

Full log

Message #26 received at 26051 <at> debbugs.gnu.org (full text, mbox):

From: Andreas Politz <politza <at> hochschule-trier.de>
To: ynyaaa <at> gmail.com
Cc: 26051 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>
Subject: Re: bug#26051: 25.1; overlays may make emacs very slow
Date: Mon, 13 Mar 2017 12:29:37 +0100

ynyaaa <at> gmail.com writes:

> (benchmark
>  1
>  '(with-temp-buffer
>     (let ((n 65536))
>       (save-excursion (dotimes (i n) (insert (format "\u00E1%d\n" i))))
>       (dotimes (i n) (make-overlay (point) (point)) (forward-line)))))
> =>"Elapsed time: 129.815000s (0.277000s in 17 GCs)"

I feel like I should advertise my noverlay branch

    https://github.com/politza/emacs-noverlay

where this takes 0.15s on my laptop.

-ap
This bug report was last modified 1 year and 209 days ago.

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