Subject: bug#56682: Fix the long lines font locking related slowdowns

From: Eli Zaretskii <[email-masked]>
Date: Fri, 05 Aug 2022 16:05:36 +0300

> From: Stefan Monnier <[email-masked]>
> Cc: [email-masked],  [email-masked],  [email-masked]
> Date: Fri, 05 Aug 2022 08:06:32 -0400
> 
> > If and when it is solved, we could revisit this issue.
> 
> The locked narrowing currently in effect makes it impossible to
> investigate this problem or improve the behavior :-(

??? Just set long-line-threshold to nil, and you can investigate all
you want.