bug#71644: 30.0.50; Severe slowdown in larger files with markers beginning in emacs 29+

[Ihor Radchenko]

Mitchell <mitchellahren@gmail.com> writes:

> Here are the steps to reproduce the issue:
> ...

For the record, I am able to reproduce the problem using the latest
Emacs master.

And the problem does disappear with my patch that affects the marker
loop in src/marker.c (buf_bytepos_to_charpos)

So, markers appear to be the culprit on my system.

-- 
Ihor Radchenko // yantar92,
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