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

From: Eli Zaretskii <[email-masked]>
Date: Mon, 15 Aug 2022 05:35:37 +0300

> Cc: [email-masked], [email-masked]
> Date: Sun, 14 Aug 2022 20:31:03 +0300
> From: Eli Zaretskii <[email-masked]>
> 
> Maybe we should measure the increment in MODIFF across the calls to
> fontification-functions in handle_fontified_prop, and correct
> UNCHANGED_MODIFIED by the same increment when fontification-functions
> return?

Hmm... I'm having second thoughts on this idea.  Let me think some
more.