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

From: Lars Ingebrigtsen <[email-masked]>
Date: Wed, 17 Aug 2022 14:36:34 +0200

Eli Zaretskii <[email-masked]> writes:

> Well, next time it happens, would you please note the file/URL and
> post it?

It's not that simple, but I think I have may have a recipe now.  But one
question first: Is (setq long-line-threshold nil) supposed to disable
these optimisations totally, or are there other things also in the mix
now?

Because I'm seeing these oddnesses even if I do that.