[Test] Add TypedArray constructor benchmarks.

Add a simple benchmark for a TypedArray constructor. Run once with the
default pipeline and once with turbofan so that we can compare the
performance.

Also fixes a typo in the Regex for the result of the CopyWithin
benchmark which stopped the results showing up in the perf
dashboard.

BUG=

Change-Id: Ic2eb0bd1e02b458c1163e97130abd0e7531c2e1c
Reviewed-on: https://chromium-review.googlesource.com/440225Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43087}

test/js-perf-test/JSTests.json

@@ -278,13 +278,25 @@
     {
       "name": "TypedArrays",
       "path": ["TypedArrays"],
-      "main": "run.js",
-      "resources": [
-        "typedarrays.js"
-      ],
-      "results_regexp": "^TypedArrays\\-%s\\(Scope\\): (.+)$",
+      "results_regexp": "^TypedArrays\\-%s\\(Score\\): (.+)$",
       "tests": [
-        {"name": "CopyWithin"}
+        {
+          "name": "CopyWithin",
+          "main": "run.js",
+          "test_flags": ["typedarrays"]
+        },
+        {
+          "name": "Constructor",
+          "main": "run.js",
+          "test_flags": ["constructor"]
+        },
+        {
+          "name": "Constructor--Future",
+          "flags": ["--future"],
+          "results_regexp": "^TypedArrays\\-Constructor\\(Score\\): (.+)$",
+          "main": "run.js",
+          "test_flags": ["constructor"]
+        }
       ]
     }
   ]

test/js-perf-test/TypedArrays/constructor.js

+// 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.
+
+new BenchmarkSuite('Constructor', [1000], [
+  new Benchmark('Constructor', false, false, 0, constructor),
+]);
+
+function constructor() {
+  new Int32Array(16);
+}

test/js-perf-test/TypedArrays/run.js

@@ -2,10 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
 load('../base.js');
-load('typedarrays.js');
-
+load(arguments[0] + '.js');
 
 var success = true;
 
@@ -13,7 +11,6 @@ function PrintResult(name, result) {
   print(`TypedArrays-${name}(Score): ${result}`);
 }
 
-
 function PrintError(name, error) {
   PrintResult(name, error);
   success = false;