From: Jens Lehmann <Jens.Lehmann@web.de>
Date: Sat, 23 Jan 2010 22:04:12 +0000 (+0100)
Subject: git-gui: Use git diff --submodule when available
X-Git-Tag: v1.7.0-rc2^2~17
X-Git-Url: https://git.lorimer.id.au/gitweb.git/diff_plain/a9ae14a1c50a9b5bd051be629dba0fb04b6fd67a?hp=a9ae14a1c50a9b5bd051be629dba0fb04b6fd67a

git-gui: Use git diff --submodule when available

Doing so is much faster and gives the same output.
Here are some numbers:

$ time git submodule summary
real	0m0.219s
user	0m0.050s
sys	0m0.111s

$ time git diff --submodule
real	0m0.012s
user	0m0.003s
sys	0m0.009s

Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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