[jstest] Add benchmarks that sort arrays of different lengths

All other sorting benchmarks use arrays of roughly the same length.
This CL adds a set of benchmarks that sort arrays of various lengths.

Two data configurations are used for each length: Completely random
and already sorted.

R=jgruber@chromium.org

Bug: v8:7382
Change-Id: Ib80a3421a68029c8e4f823605bab7b2d7fe1ae34
Reviewed-on: https://chromium-review.googlesource.com/1109509
Commit-Queue: Simon Zünd <szuend@google.com>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53917}

test/js-perf-test/ArraySort/sort-lengths.js

@@ -0,0 +1,40 @@
+// 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.
+
+load('sort-base.js');
+
+function SortAsc() {
+  array_to_sort.sort(cmp_smaller);
+}
+
+function Random(length) {
+  for (let i = 0; i < length; ++i) {
+    array_to_sort.push(Math.floor(Math.random()) * length);
+  }
+  AssertPackedSmiElements();
+}
+
+function Sorted(length) {
+  for (let i = 0; i < length; ++i) {
+    array_to_sort.push(i);
+  }
+  AssertPackedSmiElements();
+}
+
+function TearDown() {
+  array_to_sort = [];
+}
+
+function CreateSortSuitesForLength(length) {
+  createSortSuite(
+      'Random' + length, 1000, SortAsc, () => Random(length), TearDown);
+  createSortSuite(
+      'Sorted' + length, 1000, SortAsc, () => Sorted(length), TearDown);
+}
+
+CreateSortSuitesForLength(10);
+CreateSortSuitesForLength(100);
+CreateSortSuitesForLength(1000);
+CreateSortSuitesForLength(10000);
+CreateSortSuitesForLength(100000);

test/js-perf-test/JSTests.json

@@ -810,6 +810,29 @@
         {"name": "MultipleCompareFns"}
       ]
     },
+    {
+      "name": "ArraySortDifferentLengths",
+      "path": ["ArraySort"],
+      "main": "run.js",
+      "resources": ["sort-base.js", "sort-lengths.js"],
+      "test_flags": ["sort-lengths"],
+      "results_regexp": "^%s\\-ArraySort\\(Score\\): (.+)$",
+      "flags": [
+        "--allow-natives-syntax"
+      ],
+      "tests": [
+        {"name": "Random10"},
+        {"name": "Sorted10"},
+        {"name": "Random100"},
+        {"name": "Sorted100"},
+        {"name": "Random1000"},
+        {"name": "Sorted1000"},
+        {"name": "Random10000"},
+        {"name": "Sorted10000"},
+        {"name": "Random100000"},
+        {"name": "Sorted100000"}
+      ]
+    },
     {
       "name": "ForLoops",
       "path": ["ForLoops"],