[PATCH v2 1/3] reset: don't compute unstaged changes after reset when --quiet

[Ben Peart <peartben@gmail.com>]

From: Ben Peart <benpeart@microsoft.com>

When git reset is run with the --quiet flag, don't bother finding any
additional unstaged changes as they won't be output anyway.  This speeds up
the git reset command by avoiding having to lstat() every file looking for
changes that aren't going to be reported anyway.

The savings can be significant.  In a repo with 200K files "git reset"
drops from 7.16 seconds to 0.32 seconds for a savings of 96%.

Signed-off-by: Ben Peart <benpeart@microsoft.com>
---
 builtin/reset.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/builtin/reset.c b/builtin/reset.c
index 11cd0dcb8c..04f0d9b4f5 100644
--- a/builtin/reset.c
+++ b/builtin/reset.c
@@ -375,7 +375,7 @@ int cmd_reset(int argc, const char **argv, const char *prefix)
 			int flags = quiet ? REFRESH_QUIET : REFRESH_IN_PORCELAIN;
 			if (read_from_tree(&pathspec, &oid, intent_to_add))
 				return 1;
-			if (get_git_work_tree())
+			if (!quiet && get_git_work_tree())
 				refresh_index(&the_index, flags, NULL, NULL,
 					      _("Unstaged changes after reset:"));
 		} else {
-- 
2.18.0.windows.1