[tests] Add js-perf-test for %TypedArray%.prototype.sort

- Add benchmark for sorting of Float64Array
- Rename existing typedarray.js to copywithin.js

BUG=v8:5953
R=bmeurer@chromium.org, caitp@chromium.org, petermarshall@chromium.org

Review-Url: https://codereview.chromium.org/2691423003
Cr-Commit-Position: refs/heads/master@{#43217}

test/js-perf-test/JSTests.json

@@ -283,7 +283,7 @@
         {
           "name": "CopyWithin",
           "main": "run.js",
-          "test_flags": ["typedarrays"]
+          "test_flags": ["copywithin"]
         },
         {
           "name": "Constructor",
@@ -296,6 +296,11 @@
           "results_regexp": "^TypedArrays\\-Constructor\\(Score\\): (.+)$",
           "main": "run.js",
           "test_flags": ["constructor"]
+        },
+        {
+          "name": "Sort",
+          "main": "run.js",
+          "test_flags": ["sort"]
         }
       ]
     }

test/js-perf-test/TypedArrays/sort.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('Sort', [1000], [
+  new Benchmark('Sort', false, false, 0,
+                sortLarge, sortLargeSetup, sortLargeTearDown),
+]);
+
+var size = 3000;
+var initialLargeFloat64Array = new Array(size);
+for (var i = 0; i < size; ++i) {
+  initialLargeFloat64Array[i] = Math.random();
+}
+initialLargeFloat64Array = new Float64Array(initialLargeFloat64Array);
+var largeFloat64Array;
+
+function sortLarge() {
+  largeFloat64Array.sort();
+}
+
+function sortLargeSetup() {
+  largeFloat64Array = new Float64Array(initialLargeFloat64Array);
+}
+
+function sortLargeTearDown() {
+  for (var i = 0; i < size - 1; ++i) {
+    if (largeFloat64Array[i] > largeFloat64Array[i+1]) {
+      throw new TypeError("Unexpected result!\n" + largeFloat64Array);
+    }
+  }
+  largeFloat64Array = void 0;
+}