This will make all index entries racily clean. The linux-2.6
project, for example, there are over 20,000 files in the working
-tree. On my Athron 64X2 3800+, after the above:
+tree. On my Athlon 64 X2 3800+, after the above:
$ /usr/bin/time git diff-files
1.68user 0.54system 0:02.22elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k