PerformanceTests/SixSpeed/tests/map-set-object/map-set-object.es5

function fn() {
  var keys = [],
      values = [],
      set = [],
      key = {};

  for (var i = 0; i < 500; i++) {
    keys.push(i);
    values.push(i);
    set.push(i);
  }

  keys.push(key);
  values.push('bar');
  set.push(key);

  return set.indexOf(key) >= 0 && keys.indexOf(key) >= 0;
}

assertEqual(fn(), true);
test(fn);