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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: Does emacs cache something on windows when invoking call-process?
Date: Tue, 09 Jul 2019 20:27:27 +0300
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> From: Eighty Megabytes <emacsuser@freemail.hu>
> Date: Tue,  9 Jul 2019 19:08:53 +0200 (CEST)
> 
> > This is pure guessing on my part; please let's use a command
> > that is likely to be on any Windows machine.
> 
> I tried it with grep and I don't see the slowdown there, so I'm
> out of ideas.

What kind of program is ripgrep?  Is it per chance a Cywgin or MSYS2
executable?  If so, perhaps the time you see is spent loading the
Cygwin/MSYS2 DLL.

> I'll think of other ways of tracking down the problem. E.g. using
> some systrace tool or something too see where emacs spends that
> 6-7 seconds.

Good idea.