From: Marius Storm-Olsen <marius@trolltech.com>
Date: Sun, 31 May 2009 16:15:22 +0000 (+0200)
Subject: MinGW readdir reimplementation to support d_type
X-Git-Tag: v1.6.4-rc0~63^2~5
X-Git-Url: https://git.lorimer.id.au/gitweb.git/diff_plain/e16c60d9f98c66fd2c9bba64562b3439970c13f8?ds=inline;hp=e16c60d9f98c66fd2c9bba64562b3439970c13f8

MinGW readdir reimplementation to support d_type

The original readdir implementation was fast, but didn't
support the d_type. This means that git would do additional
lstats for each entry, to figure out if the entry was a
directory or not. This unneedingly slowed down many
operations, since Windows API provides this information
directly when walking the directories.

By running this implementation on Moe's repo structure:
mkdir bummer && cd bummer; for ((i=0;i<100;i++)); do
mkdir $i && pushd $i;
for ((j=0;j<1000;j++)); do echo "$j" >$j; done;
popd;
done

We see the following speedups:
git add .
-------------------
old: 00:00:23(.087)
new: 00:00:21(.512) 1.07x

git status
-------------------
old: 00:00:03(.306)
new: 00:00:01(.684) 1.96x

git clean -dxf
-------------------
old: 00:00:01(.918)
new: 00:00:00(.295) 6.50x

Signed-off-by: Marius Storm-Olsen <marius@trolltech.com>
Signed-off-by: Steffen Prohaska <prohaska@zib.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---