From: Junio C Hamano <junkio@cox.net>
Date: Thu, 5 May 2005 22:29:06 +0000 (-0700)
Subject: Do not write out new index if nothing has changed.
X-Git-Tag: v0.99~634^2^3
X-Git-Url: https://git.lorimer.id.au/gitweb.git/diff_plain/c4b83e618f1df7d8ecc9392fa40e5bebccbe6b5a?ds=inline;hp=c4b83e618f1df7d8ecc9392fa40e5bebccbe6b5a

Do not write out new index if nothing has changed.

The git-update-cache command, especially with --refresh, may not change
anything.  In such a case, writing 1.6MB of the same thing is a waste.

Signed-off-by: Junio C Hamano <junkio@cox.net>
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