1 files changed, 18 insertions, 0 deletions
diff --git a/third_party/webkit/PerformanceTests/six-speed/tests/map-set-lookup.es6 b/third_party/webkit/PerformanceTests/six-speed/tests/map-set-lookup.es6
new file mode 100644
index 0000000000..2fc9c503e2
--- /dev/null
+++ b/third_party/webkit/PerformanceTests/six-speed/tests/map-set-lookup.es6
@@ -0,0 +1,18 @@
+var map = new Map(),
+    set = new Set(),
+    key = {};
+
+for (var i = 0; i < 500; i++) {
+  map.set(i, i);
+  set.add(i);
+}
+
+map.set(key, 'bar');
+set.add(key);
+
+function fn() {
+  return map.has(key) && set.has(key);
+}
+
+assertEqual(fn(), true);
+test(fn);