bug#58558: 29.0.50; re-search-forward is slow in some buffers

[Lars Ingebrigtsen]

Ihor Radchenko <yantar92@posteo.net> writes:

>> If you switch the buffer to `clean-mode' (which should remove all text
>> props), does the slowdown disappear?  In that case, it seems likely that
>> the slowdown is connected to text properties, somehow.
>
> The slowdown becomes slightly better, but nowhere close to Emacs 28:
>
> ;; Emacs 29
> ;; Elapsed time: 16.953404s
> ;; Emacs 29 + clean-mode
> ;; Elapsed time: 13.290568s
> ;; Emacs 28
> ;; Elapsed time: 0.869748s

Hm...  Another test -- could you try `find-file-literally' on the Org
file and repeat the search?