Start using the partial tree reading in "git-diff-cache"

The reason I say "start using" is that we really should also limit the
index checking by name - now we limit the tree object accesses by name,
but we still check the whole index.

Still, this should help.

diff --git a/diff-cache.c b/diff-cache.c
index d78cbb5..be92222 100644 (file)
--- a/diff-cache.c
+++ b/diff-cache.c
@@ -278,12 +278,12 @@ int main(int argc, const char **argv)
        tree = read_object_with_reference(sha1, "tree", &size, NULL);
        if (!tree)
                die("bad tree object %s", tree_name);
-       if (read_tree(tree, size, 1, NULL))
+       if (read_tree(tree, size, 1, pathspec))
                die("unable to read tree object %s", tree_name);
 
        ret = diff_cache(active_cache, active_nr);
 
-       diffcore_std(pathspec ? : NULL,
+       diffcore_std(pathspec,
                     detect_rename, diff_score_opt,
                     pickaxe, pickaxe_opts,
                     diff_break_opt,