Re: Make `git fetch --all` parallel?

From: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Date: Oct 11, 2016, 23:16 UTC
Message-ID: <CACBZZX6pFbu_CWMG+OTxx8L2OEy4X4RqGfQ_+z4zFOhS-zx8zA@mail.gmail.com>
In-Reply-To: <20161011225942.tvqbbzxglvu7lldi@sigill.intra.peff.net>

On Wed, Oct 12, 2016 at 12:59 AM, Jeff King <peff@peff.net> wrote:

> I'm not altogether convinced that parallel fetch would be that much
> faster, though.

I have local aliases to use GNU parallel for stuff like this, on my git.git which has accumulated 17 remotes:

    $ time parallel -j1 'git fetch {}' ::: $(git remote)
    real    0m18.265s
    $ time parallel -j8 'git fetch {}' ::: $(git remote)
    real    0m2.957s

In that case I didn't have any new objects to fetch, but just doing the negotiation in parallel was a lot faster.

So there's big wins in some cases.