khalilst

var x = new Array(1000000).fill(0).map(item => Math.floor(Math.random()*10));

console.time('1.Set');
var setResult = Array.from(new Set(x));
console.timeLog('1.Set');
console.log(setResult);

console.time('2.Reduce');
var reduceResult = x.reduce((acc, item) => {
  if (acc.indexOf(item) === -1) {