From 341048f61ebf01537db4260baf81ed1d838e5ece Mon Sep 17 00:00:00 2001
From: daan <daanl@outlook.com>
Date: Wed, 22 Jul 2020 11:08:16 -0700
Subject: [PATCH] avoid atomic operations on statistics if zero

---
 src/stats.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/stats.c b/src/stats.c
index 478f8229..e0c7f01a 100644
--- a/src/stats.c
+++ b/src/stats.c
@@ -70,6 +70,7 @@ void _mi_stat_decrease(mi_stat_count_t* stat, size_t amount) {
 // must be thread safe as it is called from stats_merge
 static void mi_stat_add(mi_stat_count_t* stat, const mi_stat_count_t* src, int64_t unit) {
   if (stat==src) return;
+  if (src->allocated==0 && src->freed==0) return;
   mi_atomic_addi64( &stat->allocated, src->allocated * unit);
   mi_atomic_addi64( &stat->current, src->current * unit);
   mi_atomic_addi64( &stat->freed, src->freed * unit);