Subject: bug#57207: 29.0.50; Fontification is slow after e7b5912b23 (Improvements to long lines handling)

From: Lars Ingebrigtsen <[email-masked]>
Date: Fri, 19 Aug 2022 18:08:00 +0200

Lars Ingebrigtsen <[email-masked]> writes:

> I tried reproducing this on Macos, but it doesn't happen there.  Are
> there Linux-specific code paths in this narrowing code?

No, hang on -- I can reproduce it on Macos, too, after installing
ispell.

Could the reason you're not seeing this be because flyspell-mode doesn't
trigger for you?