1 files changed, 50 insertions, 0 deletions
diff --git a/deps/v8/test/js-perf-test/Strings/string-stringat-comp.js b/deps/v8/test/js-perf-test/Strings/string-stringat-comp.js
new file mode 100644
index 0000000000..37c5e1eabd
--- /dev/null
+++ b/deps/v8/test/js-perf-test/Strings/string-stringat-comp.js
@@ -0,0 +1,50 @@
+// Copyright 2017 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.
+
+function benchy(f, name) {
+  new BenchmarkSuite(name, [1], [
+    new Benchmark(name, true, false, 0, f),
+  ]);
+}
+
+const input = 'äϠ�𝌆 Lorem ipsum test test';
+
+function helper(fn) {
+  var sum = 0;
+  for (var i = 0; i < input.length; i++) {
+    sum += fn(input, i, i);
+  }
+  return sum;
+}
+
+function charCodeAt(str, i) {
+  return str.charCodeAt(i) === 116;
+}
+
+function charCodeAtBoth(str, i, j) {
+  return str.charCodeAt(j) == str.charCodeAt(i);
+}
+
+function charAt(str, i) {
+  return 't' == str.charAt(i);
+}
+
+function charAtNever(str, i) {
+  return '𝌆' == str.charAt(i);
+}
+
+function charAtBoth(str, i, j) {
+  return str.charAt(j) == str.charAt(i);
+}
+
+function stringIndex(str, i) {
+  return str[i] === 't';
+}
+
+benchy(() => helper(charCodeAt), "charCodeAt_const");
+benchy(() => helper(charCodeAtBoth), "charCodeAt_both");
+benchy(() => helper(charAt), "charAt_const");
+benchy(() => helper(charAtNever), "charAt_never");
+benchy(() => helper(charAtBoth), "charAt_both");
+benchy(() => helper(stringIndex), "stringIndex_const");