1 files changed, 43 insertions, 0 deletions
diff --git a/deps/v8/test/js-perf-test/Array/copy-within.js b/deps/v8/test/js-perf-test/Array/copy-within.js
new file mode 100644
index 0000000000..c3cf33b481
--- /dev/null
+++ b/deps/v8/test/js-perf-test/Array/copy-within.js
@@ -0,0 +1,43 @@
+// Copyright 2018 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+(() => {
+
+const kArraySize = 1000;
+const kQuarterSize = kArraySize / 4;
+
+let array = [];
+
+// Copy a quarter of the elements from the middle to the front.
+function CopyWithin() {
+  return new Function(
+    'array.copyWithin(0, kQuarterSize * 2, kQuarterSize * 3);');
+}
+
+createSuite('SmiCopyWithin', 1000, CopyWithin, SmiCopyWithinSetup);
+createSuite('StringCopyWithin', 1000, CopyWithin, StringCopyWithinSetup);
+createSuite('SparseSmiCopyWithin', 1000, CopyWithin, SparseSmiCopyWithinSetup);
+createSuite(
+    'SparseStringCopyWithin', 1000, CopyWithin, SparseStringCopyWithinSetup);
+
+function SmiCopyWithinSetup() {
+  array = [];
+  for (let i = 0; i < kArraySize; ++i) array[i] = i;
+}
+
+function StringCopyWithinSetup() {
+  array = [];
+  for (let i = 0; i < kArraySize; ++i) array[i] = `Item no. ${i}`;
+}
+
+function SparseSmiCopyWithinSetup() {
+  array = [];
+  for (let i = 0; i < kArraySize; i += 10) array[i] = i;
+}
+
+function SparseStringCopyWithinSetup() {
+  array = [];
+  for (let i = 0; i < kArraySize; i += 10) array[i] = `Item no. ${i}`;
+}
+
+})();