GNU bug report logs - #56682
Fix the long lines font locking related slowdowns

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From: Gregory Heytings <gregory <at> heytings.org>
To: Juri Linkov <juri <at> linkov.net>
Cc: 56682 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>, Stefan Monnier <monnier <at> iro.umontreal.ca>, Dmitry Gutov <dgutov <at> yandex.ru>
Subject: bug#56682: locked narrowing
Date: Tue, 06 Dec 2022 20:11:41 +0000

>
> There is another side-effect: after evaluating manually 'M-: 
> (pos-visible-in-window-p) RET' at the position 1000000, point moves to 
> the position 749873 afterwards.  It seems this is related to locked 
> narrowing, because point doesn't jump after customizing 
> long-line-locked-narrowing-region-size to 0.
>

I cannot reproduce that.  With the following recipe:

emacs -Q
C-x C-f dictionary.json RET
M-g c 1000000 RET
M-: (pos-visible-in-window-p) RET

point does not move.  Is there something missing in that recipe?

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