performance time test

performance.time.js

SpeedTest.prototype = {
  startTest: function() {
    var beginTime, endTime, sumTime = 0;
    
    for(var i = 0, x = this.repetitions; i < x; i++ ) {
      beginTime = +new Date();
      this.testImplement( this.testParams );
      endTime = +new Date();
      sumTime += endTime - beginTime;
    } 
    
    this.average += sumTimes / this.repetitions;
    return console.log('Average execution across ' + this.repetitions + ": " + this.average);
  }
}