From: Jeff King <peff@peff.net>
Date: Mon, 20 Nov 2017 20:27:19 GMT
Subject: [PATCH 2/5] t/perf/lib-pack: use fast-import checkpoint to create packs
Message-ID: <20171120202719.x2vjrwoieg3wph73@sigill.intra.peff.net>
In-Reply-To: <20171120202607.tf2pvegqe35mhxjs@sigill.intra.peff.net>

We currently use fast-import only to create a large number
of objects, and then run O(n) invocations of pack-objects to
turn them into packs.

We can do this faster by just asking fast-import to
checkpoint and create a pack for each (after telling it
not to turn loose tiny packs).

Signed-off-by: Jeff King <peff@peff.net>
---
 t/perf/lib-pack.sh | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/t/perf/lib-pack.sh b/t/perf/lib-pack.sh
index 501bb7b272..d3865db286 100644
--- a/t/perf/lib-pack.sh
+++ b/t/perf/lib-pack.sh
@@ -9,15 +9,10 @@ create_packs () {
 			print "data <<EOF";
 			print "$_";
 			print "EOF";
+			print "checkpoint"
 		}
 	' "$@" |
-	git fast-import &&
-
-	git cat-file --batch-all-objects --batch-check='%(objectname)' |
-	while read sha1
-	do
-		echo $sha1 | git pack-objects .git/objects/pack/pack
-	done
+	git fast-import
 }
 
 # create a large number of packs, disabling any gc which might
@@ -25,5 +20,6 @@ create_packs () {
 setup_many_packs () {
 	git config gc.auto 0 &&
 	git config gc.autopacklimit 0 &&
+	git config fastimport.unpacklimit 0 &&
 	create_packs 500
 }
-- 
2.15.0.494.g79a8547723