gistfile1.js

var Benchmark = require('benchmark')

var suite = new Benchmark.Suite

var foo = { }
var util = require('util')

// add tests
suite.add('Object.create()', function() {
  return Object.create(foo)
})
.add('util._extend()', function() {
  return util._extend({}, foo)
})
// add listeners
.on('cycle', function(event) {
  console.log(String(event.target))
})
.on('complete', function() {
  console.log('Fastest is ' + this.filter('fastest').pluck('name'))
})
// run async
.run({ 'async': true })