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// 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);
  }
};


//proto.js
var IP = ['Nipping Global Variable', 'Sneaky Forin', 'Bulging Blocking Script'],
GH = ['Switch Blocks', 'Pesky Gnat', 'Aiedra'],
inhabitants = [IP,GH];

var populationGetter = function(popn) {
  var list = '';
  for (var i = 0, x = popn.length; i < x; i++) {
    for (var j = 0; j < popn[i].length; j++) {
      list += (popn[i][j] + ', ');
    }
  }
  return list;
};

populationGetter(inhabitants);

var concatTest = new SpeedTest(populationGetter, inhabitants, 100000 );
concatTest.startTest();