path: root/builtin
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authorJeff Hostetler <>2017-04-14 20:32:21 (GMT)
committerJunio C Hamano <>2017-04-15 07:58:36 (GMT)
commita33fc72fe911fdb8e284c94e08e8f1dafe4d3187 (patch)
treecda596575083fbfb2ad1c30ad449926931abe669 /builtin
parente1104a5ee539408b81566066aaa6963cb87d5cd6 (diff)
read-cache: force_verify_index_checksum
Teach git to skip verification of the SHA1-1 checksum at the end of the index file in verify_hdr() which is called from read_index() unless the "force_verify_index_checksum" global variable is set. Teach fsck to force this verification. The checksum verification is for detecting disk corruption, and for small projects, the time it takes to compute SHA-1 is not that significant, but for gigantic repositories this calculation adds significant time to every command. These effect can be seen using t/perf/ Test HEAD~1 HEAD -------------------------------------------------------------------------------------- 0002.1: read_cache/discard_cache 1000 times 0.66(0.44+0.20) 0.30(0.27+0.02) -54.5% Signed-off-by: Jeff Hostetler <> Signed-off-by: Junio C Hamano <>
Diffstat (limited to 'builtin')
1 files changed, 1 insertions, 0 deletions
diff --git a/builtin/fsck.c b/builtin/fsck.c
index f76e416..b5e13a4 100644
--- a/builtin/fsck.c
+++ b/builtin/fsck.c
@@ -771,6 +771,7 @@ int cmd_fsck(int argc, const char **argv, const char *prefix)
if (keep_cache_objects) {
+ verify_index_checksum = 1;
for (i = 0; i < active_nr; i++) {
unsigned int mode;