1 files changed, 40 insertions, 0 deletions
diff --git a/js/src/devtools/gc-ubench/benchmarks/largeArrayPropertyAndElements.js b/js/src/devtools/gc-ubench/benchmarks/largeArrayPropertyAndElements.js
new file mode 100644
index 0000000000..0202f56e40
--- /dev/null
+++ b/js/src/devtools/gc-ubench/benchmarks/largeArrayPropertyAndElements.js
@@ -0,0 +1,40 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+tests.set(
+  "largeArrayPropertyAndElements",
+  (function() {
+    var garbage;
+    var index;
+
+    return {
+      description: "Large array with both properties and elements",
+
+      load: n => {
+        garbage = new Array(n);
+        garbage.fill(null);
+        index = 0;
+      },
+
+      unload: () => {
+        garbage = null;
+        index = 0;
+      },
+
+      defaultGarbagePiles: "100K",
+      defaultGarbagePerFrame: "48K",
+
+      makeGarbage: n => {
+        for (var i = 0; i < n; i++) {
+          index++;
+          index %= garbage.length;
+
+          var obj = {};
+          garbage[index] = obj;
+          garbage["key-" + index] = obj;
+        }
+      },
+    };
+  })()
+);