src/v8/test/js-perf-test/SixSpeed/map_set_add/es6.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.

// This benchmark is based on the six-speed benchmark build output.
// Copyright 2014 Kevin Decker <https://github.com/kpdecker/six-speed/>

new BenchmarkSuite("ES6", [1000], [new Benchmark("ES6", false, false, 0, ES6)]);

function ES6() {
  var map = new Map(), set = new Set();

  for (var i = 0; i < 250; i++) {
    map.set(i, i);
    set.add(i);
  }

  map.set("foo", "bar");
  set.add("bar");

  return map.has("foo") && set.has("bar");
}