Re: Drastic jump in the time required for the test suite

From: Jeff King <peff@peff.net>
Date: Oct 20, 2016, 21:57 UTC
Message-ID: <20161020215742.b5gzqvd2g6afjgmh@sigill.intra.peff.net>
In-Reply-To: <CAGZ79kZkSwbiYD=G_nSZW8_qeb2q+AOsqYipmEigTN1aNYPiEw@mail.gmail.com>

On Thu, Oct 20, 2016 at 02:53:36PM -0700, Stefan Beller wrote:

Show 14 quoted lines

> >> That said I really like the idea of having a helper that would eliminate the cat
> >> for you, e.g. :
> >>
> >> git_test_helper_equal_stdin_or_diff_and_die -C super_repo status
> >> --porcelain=v2 --branch --untracked-files=all <<-EOF
> >> 1 A. N... 000000 100644 100644 $_z40 $HMOD .gitmodules
> >> 1 AM S.M. 000000 160000 160000 $_z40 $HSUP sub1
> >> EOF
> >
> > I think that helper still ends up using "cat" and "diff" under the hood,
> 
> I assumed that helper being a C program, that only needs to fork once
> for the actual git call and then it sits idle to compare the exact output
> from stdout to its stdin.

Ah, I see. I thought you meant a shell helper. A C helper does drop 2 forks down to 1, but it would be nice if we could drop it to 0.

-Peff