Subject: bug#58342: 29.0.50; noverlay branch is O(N) for important calls

From: Dmitry Gutov <[email-masked]>
Date: Sat, 8 Oct 2022 00:58:47 +0300

On 07.10.2022 23:37, Matt Armstrong wrote:
> Does anybody know of an Emacs package that uses a large number of
> overlays that span large amounts of the buffer in complex ways?  If none
> exist, maybe we can just close this bug!

mmm-mode, perhaps.

But that depends on what you mean by "large" and "complex". The overlay 
nesting scheme is usually straightforward.