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From: Junio C Hamano <junkio@cox.net>
Subject: Re: Check for differents trees
Date: Sun, 06 Nov 2005 10:09:34 -0800
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To: Marco Costalba <mcostalba@yahoo.it>
In-Reply-To: <20051106153830.18963.qmail@web26312.mail.ukl.yahoo.com> (Marco
	Costalba's message of "Sun, 6 Nov 2005 07:38:30 -0800 (PST)")
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Marco Costalba <mcostalba@yahoo.it> writes:

> What I use now is:
>
> git-diff-tree -r --name-status sha1 sha2
>
> An then I parse the output for 'A' or 'D' as first char of
> each line. When I found one of that two chars I kwnow trees
> have different files set.
>
> The problem is that if sha1 and sha2 correspond to very
> "distant" revision the output of git-diff-tree can be very
> long and also usless as long as I stop searching at first
> match.

Perhaps

	$ git-diff-tree -r --name-status --diff-filter=AD sha1 sha2

would help you somewhat?  This would not make the diff
generation part quicker, but at least you do not have to parse
other types of changes.