1 files changed, 34 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 000000000..36ae04971
--- /dev/null
+++ b/js/src/devtools/gc-ubench/benchmarks/largeArrayPropertyAndElements.js
@@ -0,0 +1,34 @@
+window.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;
+    },
+
+    defaultGarbageTotal: "100K",
+    defaultGarbagePerFrame: "30K",
+
+    makeGarbage: n => {
+      for (var i = 0; i < n; i++) {
+        index++;
+        index %= garbage.length;
+
+        var obj = {};
+        garbage[index] = obj;
+        garbage["key-" + index] = obj;
+      }
+    }
+  };
+
+}()));