From: Jeff King <peff@peff.net>
Date: Thu, 06 May 2010 05:08:36 GMT
Subject: Re: git diff timing oddity
Message-ID: <20100506050836.GA11578@coredump.intra.peff.net>
In-Reply-To: <y2j76718491005052204qb6de9c26k58eb1550f1c5346f@mail.gmail.com>

On Thu, May 06, 2010 at 01:04:18AM -0400, Jay Soffian wrote:

> git version 1.7.1, Mac OS X 10.6.3, largish repo (42K files, 35K
> commits, well packed ~ 1GB). Difference between origin and HEAD is a
> single commit.
> 
> $ time git diff --stat origin  >/dev/null
> 
> real	0m0.942s
> user	0m0.713s
> sys	0m0.223s
>
> [...]
>
> $ time git diff --stat origin HEAD >/dev/null
> 
> real	0m0.022s
> user	0m0.006s
> sys	0m0.012s
>
> [...]
> 
> These should be identical commands, so why is the "origin HEAD" form
> running an order of magnitude faster?

Isn't "git diff --stat origin" comparing against the working tree?

-Peff