[es6] add js-perf-test for rest parameters

BUG=v8:2160
LOG=N
R=adamk, rossberg, wingo

Review URL: https://codereview.chromium.org/1317113007

Cr-Commit-Position: refs/heads/master@{#30647}

test/js-perf-test/JSTests.json

@@ -8,6 +8,19 @@
   "total": true,
   "resources": ["base.js"],
   "tests": [
+    {
+      "name": "RestParameters",
+      "path": ["RestParameters"],
+      "main": "run.js",
+      "resources": ["rest.js"],
+      "flags": ["--harmony-rest-parameters"],
+      "run_count": 5,
+      "units": "score",
+      "results_regexp": "^%s\\-RestParameters\\(Score\\): (.+)$",
+      "tests": [
+        {"name": "BasicRest1"}
+      ]
+    },
     {
       "name": "SpreadCalls",
       "path": ["SpreadCalls"],

test/js-perf-test/RestParameters/rest.js

+// Copyright 2015 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.
+
+new BenchmarkSuite('Basic', [1000], [
+  new Benchmark('BasicRest1', false, false, 0,
+                BasicRest1, BasicRest1Setup, BasicRest1TearDown)
+]);
+
+// ----------------------------------------------------------------------------
+
+var result;
+
+function basic_rest_fn_1(factor, ...values) {
+  var result = 0;
+  for (var i = 0; i < values.length; ++i) {
+    result += (factor * values[i]);
+  }
+  return result;
+}
+
+function BasicRest1Setup() {}
+
+function BasicRest1() {
+  result = basic_rest_fn_1(10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
+}
+
+function BasicRest1TearDown() {
+  return result == 550;
+}

test/js-perf-test/RestParameters/run.js

+// Copyright 2015 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.
+
+
+load('../base.js');
+load('rest.js');
+
+var success = true;
+
+function PrintResult(name, result) {
+  print(name + '-RestParameters(Score): ' + result);
+}
+
+
+function PrintError(name, error) {
+  PrintResult(name, error);
+  success = false;
+}
+
+
+BenchmarkSuite.config.doWarmup = undefined;
+BenchmarkSuite.config.doDeterministic = undefined;
+
+BenchmarkSuite.RunSuites({ NotifyResult: PrintResult,
+                           NotifyError: PrintError });