GNU bug report logs - #57207
29.0.50; Fontification is slow after e7b5912b23 (Improvements to long lines handling)

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Package: emacs;

Reported by: Ihor Radchenko <yantar92 <at> gmail.com>

Date: Sun, 14 Aug 2022 15:55:01 UTC

Severity: normal

Found in version 29.0.50

Done: Gregory Heytings <gregory <at> heytings.org>

Bug is archived. No further changes may be made.

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From: Gregory Heytings <gregory <at> heytings.org>
To: Ihor Radchenko <yantar92 <at> gmail.com>
Cc: 57207 <at> debbugs.gnu.org
Subject: bug#57207: 29.0.50; Fontification is slow after e7b5912b23 (Improvements to long lines handling)
Date: Sun, 14 Aug 2022 16:08:27 +0000

>
> I am experiencing severe performance degradation on current master.
>
> The degradation happens when working with Org files
>
> [...]
>
> I was able to trigger the slowdown when unfolding headlines hidden using 
> 'invisible text property.
>
> Do you have any idea what could be going wrong or how to debug things 
> further?
>

Can you (a) provide a MRE so that we could track down what's going on 
and/or (b) try to set long-line-threshold to a larger value (20000, 50000, 
100000) and see when the performance degradation disappears?
This bug report was last modified 2 years and 169 days ago.

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