speedTest.js

var SpeedTest = function(testImplement,testParams,repetitions) {
  this.testImplement = testImplement;
  this.testParams = testParams;
  this.repetitions = repetitions || 10000;
  this.average = 0;
};

SpeedTest.prototype = {
  startTest: function() {
    if (this.testImplement(this.testParams) === false) {
      alert('Test failed with those parameters.');
      return;
    }
    var beginTime, endTime, sumTimes = 0;
    for (var i = 0, x = this.repetitions; i < x; i++) {
      beginTime = +new Date();
      this.testImplement(this.testParams);
      endTime = +new Date();
      sumTimes += endTime - beginTime;
    }
    this.average = sumTimes / this.repetitions;
    return console.log('Average execution across ' + this.repetitions + ': ' + this.average);
  }
};


// test
var list = ["como perro", "como esos crazys", "jodido pio"];
var iteration = function(list) {
  for (var i = 0; i < list.length; i++) {
    console.log(list[i])
  }
}

var tester = new SpeedTest(iteration, list, 5000)
tester.startTest();