[js-perf-test] Add benchmark for String.prototype.matchAll

Bug: v8:6890
Change-Id: I0778aee65985852950c48b519baeb7fe6d81f8eb
Reviewed-on: https://chromium-review.googlesource.com/998394
Commit-Queue: Peter Wong <peter.wm.wong@gmail.com>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52520}

test/js-perf-test/JSTests.json

@@ -271,6 +271,27 @@
             {"name": "stringIndex_const"}
           ]
         },
+        {
+          "name": "StringMatchAll",
+          "main": "run.js",
+          "resources": [ "string-matchall.js" ],
+          "flags": [
+            "--harmony-string-matchall"
+          ],
+          "test_flags": [ "string-matchall" ],
+          "results_regexp": "^%s\\-Strings\\(Score\\): (.+)$",
+          "run_count": 1,
+          "tests": [
+            {"name": "StringMatchAllBuiltinRegExpIteratorCreation"},
+            {"name": "StringMatchAllBuiltinStringIteratorCreation"},
+            {"name": "StringMatchAllBuiltinString"},
+            {"name": "StringMatchAllManualString"},
+            {"name": "StringMatchAllBuiltinRegExp"},
+            {"name": "StringMatchAllManualRegExp"},
+            {"name": "StringMatchAllBuiltinZeroWidth"},
+            {"name": "StringMatchAllBuiltinZeroWidthUnicode"}
+          ]
+        },
         {
           "name": "StringSubstring",
           "main": "run.js",

test/js-perf-test/Strings/string-matchall.js

@@ -0,0 +1,77 @@
+// 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.
+
+(() => {
+
+function Internalize(s) {
+  return Object.keys({[s]:0})[0];
+}
+
+const string = Internalize('a'.repeat(100));
+let pattern;
+let result;
+
+const setupString = () => pattern = '.';
+const setupRegExp = () => pattern = /./g;
+const setupZeroWidth = () => pattern = /(?:)/g;
+const setupZeroWidthUnicode = () => pattern = /(?:)/gu;
+
+function benchIteratorCreation() {
+  result = string.matchAll(pattern);
+}
+
+function benchBuiltin() {
+  for (const match of string.matchAll(pattern)) {
+    result = match[0];
+  }
+}
+
+function benchManualString() {
+  let regexp = new RegExp(pattern, 'g');
+  let match;
+  while ((match = regexp.exec(string)) !== null) {
+    result = match[0];
+  }
+}
+
+function benchManualRegExp() {
+  let match;
+  while ((match = pattern.exec(string)) !== null) {
+    result = match[0];
+  }
+}
+
+// Iterator Creation
+new BenchmarkSuite('StringMatchAllBuiltinRegExpIteratorCreation', [20], [
+  new Benchmark('StringMatchAllBuiltinRegExpIteratorCreation', false, false, 0, benchIteratorCreation, setupRegExp)
+]);
+new BenchmarkSuite('StringMatchAllBuiltinStringIteratorCreation', [20], [
+  new Benchmark('StringMatchAllBuiltinStringIteratorCreation', false, false, 0, benchIteratorCreation, setupString)
+]);
+
+// String
+new BenchmarkSuite('StringMatchAllBuiltinString', [20], [
+  new Benchmark('StringMatchAllBuiltinString', false, false, 0, benchBuiltin, setupString)
+]);
+new BenchmarkSuite('StringMatchAllManualString', [20], [
+  new Benchmark('StringMatchAllManualString', false, false, 0, benchManualString, setupString)
+]);
+
+// RegExp
+new BenchmarkSuite('StringMatchAllBuiltinRegExp', [20], [
+  new Benchmark('StringMatchAllBuiltinRegExp', false, false, 0, benchBuiltin, setupRegExp)
+]);
+new BenchmarkSuite('StringMatchAllManualRegExp', [20], [
+  new Benchmark('StringMatchAllManualRegExp', false, false, 0, benchManualRegExp, setupRegExp)
+]);
+
+// Zero width
+new BenchmarkSuite('StringMatchAllBuiltinZeroWidth', [20], [
+  new Benchmark('StringMatchAllBuiltinZeroWidth', false, false, 0, benchBuiltin, setupZeroWidth)
+]);
+new BenchmarkSuite('StringMatchAllBuiltinZeroWidthUnicode', [20], [
+  new Benchmark('StringMatchAllBuiltinZeroWidthUnicode', false, false, 0, benchBuiltin, setupZeroWidthUnicode)
+]);
+
+})();