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

[Spencer Baugh]

Ihor Radchenko <yantar92@posteo.net> writes:
> 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?

rgrep.