Performance check about arguments with EventEmitter

benchmark.js

var EventEmitter = require('events').EventEmitter
var i;
var count = 100000000;

var e = new EventEmitter();
e.on('hi', function() {});
now = Date.now();

for (i = 0; i < count; i++) {
  e.emit('hi');
}

console.log('%d ms', Date.now() - now);