builtin/submodule--helper: factor out submodule updating

diff --git a/preload-index.c b/preload-index.c
index 2a83255e4eeaf8e8ce74516880b0333b23d6f583..4d08d4487460f839f39f667c714f1bb85fa1e144 100644 (file)
--- a/preload-index.c
+++ b/preload-index.c
@@ -78,6 +78,7 @@ static void preload_index(struct index_state *index,
 {
        int threads, i, work, offset;
        struct thread_data data[MAX_PARALLEL];
+       uint64_t start = getnanotime();
 
        if (!core_preload_index)
                return;
@@ -108,6 +109,7 @@ static void preload_index(struct index_state *index,
                if (pthread_join(p->pthread, NULL))
                        die("unable to join threaded lstat");
        }
+       trace_performance_since(start, "preload index");
 }
 #endif