Re: [PATCH] Use OBJECT_INFO_QUICK to speedup git fetch-pack
- Date: Mon, 27 Nov 2017 00:04:20 -0500
- From: Jeff King <peff@xxxxxxxx>
- Subject: Re: [PATCH] Use OBJECT_INFO_QUICK to speedup git fetch-pack
On Mon, Nov 27, 2017 at 01:53:34PM +0900, Junio C Hamano wrote:
> > I'd be curious if the 5th patch there provides an additional speedup for
> > Takuto's case.
> Indeed, it is a very good point.
> IIUC, the 5th one is about fetching tons of refs that you have never
> seen, right? If a repository that has trouble with everything-local
> is suffering because it right now has 300k remote-tracking branches,
> I'd imagine that these remote-tracking branches are being added at a
> considerable rate, so I'd not be surprised if these "new" refs
> benefits from that patch. And it would be nice to know how much a
> real life scenario actually does improve.
Right, I think it will only kick in for new refs (and maybe deleted
ones, but I didn't check).
I actually did have a real life scenario that was improved, but it's not
very typical. As I've mentioned before, we keep a big shared-object
repository for forks of a single repo, so a fairly common operation is
git -C network.git fetch ../$fork.git +refs/*:refs/remotes/$fork/*
The first time that's run on a fork, everything looks like a new ref.
So "real life", but thankfully not life for most git users. :)