Subject: bug#56393: Actually fix the long lines display bug

From: Stefan Kangas <[email-masked]>
Date: Wed, 6 Jul 2022 15:34:56 +0200

Gregory Heytings <[email-masked]> writes:

> As far as I can tell, it's a full and complete solution, which makes a few
> compromises (as few as possible).
[...]
> Font locking is as far as I can see the main reason why Emacs is still a
> bit sluggish in such cases.

Surely, a full and complete solution should make *no* compromises, not
even with secondary features.  (And preferably be completely
transparent to Lisp.)