bug#64735: 29.0.92; find invocations are ~15x slower because of ignores

[Ihor Radchenko]

Spencer Baugh <sbaugh@janestreet.com> writes:

>> Does find use multiple CPU cores?
>
> Not on its own, but when it's running as a separate subprocess of Emacs,
> that subprocess can (and will, on modern core-rich hardware) run on a
> different CPU core from Emacs itself.  That's a form of parallelism
> which is very achievable for Emacs, and provides a big performance win.

AFAIU, the way find is called by project.el is synchronous: (1) call
find; (2) wait until it produces all the results; (3) process the
results. In such scenario, there is no gain from subprocess.

Is any part of Emacs is even using sentinels together with find?

-- 
Ihor Radchenko // yantar92,
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