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

[Eli Zaretskii]

> From: Ihor Radchenko <yantar92@posteo.net>
> Cc: larsi@gnus.org, monnier@iro.umontreal.ca, 58558@debbugs.gnu.org
> Date: Tue, 13 Dec 2022 15:56:33 +0000
> 
> My guess: number of markers is growing somehow?

That was my guess, yeah.

So now the question becomes: who creates all those additional markers
if all you do is run the benchmark?

If no other idea to find this out comes up, maybe run this with a
breakpoint in make-marker, look at the backtrace to see the callers.