+
Version 4 performs a simple pathname compression that reduces index
size by 30%-50% on large repositories, which results in faster load
-time. Version 4 is relatively young (first released in in 1.8.0 in
+time. Version 4 is relatively young (first released in 1.8.0 in
October 2012). Other Git implementations such as JGit and libgit2
may not support it yet.
Using --refresh
---------------
`--refresh` does not calculate a new sha1 file or bring the index
-up-to-date for mode/content changes. But what it *does* do is to
+up to date for mode/content changes. But what it *does* do is to
"re-match" the stat information of a file with the index, so that you
can refresh the index for a file that hasn't been changed but where
the stat entry is out of date.