From 0cbb44afb0d9f23734c665e1666ce421bc67da2a Mon Sep 17 00:00:00 2001
From: Takuto Ikuta <tikuta@chromium.org>
Date: Wed, 22 Nov 2017 20:39:38 +0900
Subject: [PATCH] fetch-pack.c: enable fscache for stats under .git/objects

When I do git fetch, git call file stats under .git/objects for each
refs. This takes time when there are many refs.

By enabling fscache, git takes file stats by directory traversing and that
improved the speed of fetch-pack for repository having large number of
refs.

In my windows workstation, this improves the time of `git fetch` for
chromium repository like below. I took stats 3 times.

* With this patch
TotalSeconds: 9.9825165
TotalSeconds: 9.1862075
TotalSeconds: 10.1956256
Avg: 9.78811653333333

* Without this patch
TotalSeconds: 15.8406702
TotalSeconds: 15.6248053
TotalSeconds: 15.2085938
Avg: 15.5580231

Signed-off-by: Takuto Ikuta <tikuta@chromium.org>
---
 fetch-pack.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fetch-pack.c b/fetch-pack.c
index 1d6117565c..4b1c6e0022 100644
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -722,6 +722,7 @@ static int everything_local(struct fetch_pack_args *args,
 
 	save_commit_buffer = 0;
 
+	enable_fscache(1);
 	for (ref = *refs; ref; ref = ref->next) {
 		struct object *o;
 
@@ -743,6 +744,7 @@ static int everything_local(struct fetch_pack_args *args,
 				cutoff = commit->date;
 		}
 	}
+	enable_fscache(0);
 
 	if (!args->no_dependents) {
 		if (!args->deepen) {