Re: Question: add-face-text-property for 'font-lock-face?

[Ihor Radchenko]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>> I now see that Yuan’s suggestion of overlay will do this, but there’s
>> performance concern.
>
> The performance concern is largely hypothetical, and if it ever proves
> real, we have a branch waiting to be merged that reimplement overlays
> in a more efficient (algorithmically) way.

It is not hypothetical [1]. I have reported issues with overlays in
org-mode in the past. Also, from my experience, large number of overlays
appear to cause garbage collection issues and overall Emacs slowdown.

Is the overlay branch ready to be merged? I am only aware about yet
another effort to revive it back in 2019 [2]. Is there any progress
since then?

Best,
Ihor


[1] https://lists.gnu.org/archive/html/bug-gnu-emacs/2019-05/msg00206.html
[2] https://lists.gnu.org/archive/html/emacs-devel/2019-12/msg00323.html