path: root/cache-tree.c
diff options
authorNguyễn Thái Ngọc Duy <>2018-08-18 14:41:23 (GMT)
committerJunio C Hamano <>2018-08-18 16:47:46 (GMT)
commit0d1ed5963da5d7410ad86eeaa64b3710e4aaa0c0 (patch)
tree38f6b28d7ff13a061509bd1b093e47b1c1a6136c /cache-tree.c
parentc46c406ae1ee30f64a13083edfa5683d2685fd61 (diff)
unpack-trees: add performance tracing
We're going to optimize unpack_trees() a bit in the following patches. Let's add some tracing to measure how long it takes before and after. This is the baseline ("git checkout -" on webkit.git, 275k files on worktree) performance: 0.056651714 s: read cache .git/index performance: 0.183101080 s: preload index performance: 0.008584433 s: refresh index performance: 0.633767589 s: traverse_trees performance: 0.340265448 s: check_updates performance: 0.381884638 s: cache_tree_update performance: 1.401562947 s: unpack_trees performance: 0.338687914 s: write index, changed mask = 2e performance: 0.411927922 s: traverse_trees performance: 0.000023335 s: check_updates performance: 0.423697246 s: unpack_trees performance: 0.423708360 s: diff-index performance: 2.559524127 s: git command: git checkout - Signed-off-by: Nguyễn Thái Ngọc Duy <> Signed-off-by: Junio C Hamano <>
Diffstat (limited to 'cache-tree.c')
1 files changed, 2 insertions, 0 deletions
diff --git a/cache-tree.c b/cache-tree.c
index 181d591..caafbff 100644
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -433,7 +433,9 @@ int cache_tree_update(struct index_state *istate, int flags)
if (i)
return i;
+ trace_performance_enter();
i = update_one(it, cache, entries, "", 0, &skip, flags);
+ trace_performance_leave("cache_tree_update");
if (i < 0)
return i;
istate->cache_changed |= CACHE_TREE_CHANGED;