[Intl] Performance benchmark for String.normalize

$ python -u tools/run_perf.py --binary-override-path   out/x64.release/d8 --filter "JSTests/Strings/StringNormalize"  test/js-perf-test/JSTests.json
INFO      >>> Running suite: JSTests/Strings/StringNormalize
INFO      >>> Stdout (#1):
StringNormalize-Strings(Score): 4014
StringNormalizeNFD-Strings(Score): 742
StringNormalizeNFKC-Strings(Score): 3066
StringNormalizeNFKD-Strings(Score): 739

Bug: v8:8844
Change-Id: Ic941bafa82cead9cd0110ad7ac46e528d481189b
Reviewed-on: https://chromium-review.googlesource.com/c/1470964
Commit-Queue: Frank Tang <ftang@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59612}

test/js-perf-test/JSTests.json

@@ -482,6 +482,20 @@
             {"name": "stringIndex_const"}
           ]
         },
+        {
+          "name": "StringNormalize",
+          "main": "run.js",
+          "resources": [ "string-normalize.js" ],
+          "test_flags": [ "string-normalize" ],
+          "results_regexp": "^%s\\-Strings\\(Score\\): (.+)$",
+          "run_count": 1,
+          "tests": [
+            {"name": "StringNormalize"},
+            {"name": "StringNormalizeNFD"},
+            {"name": "StringNormalizeNFKC"},
+            {"name": "StringNormalizeNFKD"}
+          ]
+        },
         {
           "name": "StringLocaleCompare",
           "main": "run.js",

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

+// Copyright 2019 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('StringNormalize', [5], [
+  new Benchmark('StringNormalize', false, false, 0,
+  StringNormalize),
+]);
+new BenchmarkSuite('StringNormalizeNFD', [5], [
+  new Benchmark('StringNormalizeNFD', false, false, 0,
+  StringNormalizeNFD),
+]);
+new BenchmarkSuite('StringNormalizeNFKC', [5], [
+  new Benchmark('StringNormalizeNFKC', false, false, 0,
+  StringNormalizeNFKC),
+]);
+new BenchmarkSuite('StringNormalizeNFKD', [5], [
+  new Benchmark('StringNormalizeNFKD', false, false, 0,
+  StringNormalizeNFKD),
+]);
+
+const shortString = "àèìòùáéíóúäëïöüÿâêîôûãõñ";
+
+function StringNormalize() {
+  return shortString.normalize();
+}
+
+function StringNormalizeNFD() {
+  return shortString.normalize("NFD");
+}
+
+function StringNormalizeNFKC() {
+  return shortString.normalize("NFKC");
+}
+
+function StringNormalizeNFKD() {
+  return shortString.normalize("NFKD");
+}