From 00ec50e56d136de41f43c33f39cdbee83f3e4458 Mon Sep 17 00:00:00 2001 From: Ben Peart Date: Wed, 18 Oct 2017 10:27:25 -0400 Subject: read_index_from(): speed index loading by skipping verification of the entry order There is code in post_read_index_from() to catch out of order entries when reading an index file. This order verification is ~13% of the cost of every call to read_index_from(). Update check_ce_order() so that it skips this verification unless the "verify_ce_order" global variable is set. Teach fsck to force this verification. The effect can be seen using t/perf/p0002-read-cache.sh: Test HEAD HEAD~1 -------------------------------------------------------------------------------------- 0002.1: read_cache/discard_cache 1000 times 0.41(0.04+0.04) 0.50(0.00+0.10) +22.0% Signed-off-by: Ben Peart Signed-off-by: Junio C Hamano --- builtin/fsck.c | 1 + 1 file changed, 1 insertion(+) (limited to 'builtin') diff --git a/builtin/fsck.c b/builtin/fsck.c index d18244ab5..81cc5ad78 100644 --- a/builtin/fsck.c +++ b/builtin/fsck.c @@ -763,6 +763,7 @@ int cmd_fsck(int argc, const char **argv, const char *prefix) if (keep_cache_objects) { verify_index_checksum = 1; + verify_ce_order = 1; read_cache(); for (i = 0; i < active_nr; i++) { unsigned int mode; -- cgit v1.2.1