Hi Michał,

On Tue, 13 Oct 2020, Michał Kępień wrote:

> > > First, let me say that the goal of minimizing the run time of a test
> > > suite is close to my heart (it is an issue at my day job).  Yet, I
> > > assumed that this new test would not be detrimental to test suite run
> > > times as it takes about half a second to run t4069-diff-ignore-regex.sh
> > > on my machine - and (I hope) its contents are in line with the "tests
> > > are the best documentation" proverb.
> >
> > Sadly, the test is not quite as fast on Windows. I just ran this (on a not
> > quite idle machine, admittedly) and it ended in this:
> >
> > 	# passed all 11 test(s)
> > 	1..11
> >
> > 	real    0m51.470s
> > 	user    0m0.046s
> > 	sys     0m0.015s
> >
> > Yes, that's almost a minute.
>
> Out of curiosity: is that under Cygwin?  I have seen shell-based tests
> finishing in 15 *seconds* on Unix-like systems and in 15 *minutes* under
> Cygwin, which would be in line with your measurements provided above.

Close enough: it's an MSYS2 Bash (and MSYS2 is a close fork of Cygwin). It
is what Git for Windows uses.

Ciao,
Dscho