upto.js

var Benchmark = require('benchmark');
var suite = new Benchmark.Suite;

var strings = [
    'hi, there',
    'you scoundrel',
    'cheers',
    'cheers, you',
    'cheers, you, there',
    'lol',
    'donuts'
];

// add tests
suite
.add('split', function() {
    strings.map(function(str) {
        return str.split(',')[0]
    });
})
.add('indexOf', function() {
    strings.map(function(str) {
        var firstC = str.indexOf(',');
        return firstC === -1 ? str : str.substr(0, firstC);
    });
})
// add listeners
.on('cycle', function(event) {
  console.log(String(event.target));
})
.on('complete', function() {
  console.log('Fastest is ' + this.filter('fastest').map('name'));
})
// run async
.run({ 'async': true });