JavaScript Performance Tester

Tests performance of different JavaScript Functions and prints the results to the console.

HTML

<input id="runTests" type="button" value="Run Tests"/>
<div id="testOutput"/>

JavaScript

var SECONDS_PER_TEST = 5;
var MS_PER_TEST = SECONDS_PER_TEST * 1000;
var MAX_TESTS_TO_RUN = 10;

var a = [];

var initializeTest = function(){
    for(var i = 0; i < MAX_TESTS_TO_RUN; i++){
        a[i] = 0;
    }
};

const ARRAY_SIZE = 10;
var tests = {
    firstMethod: function(){
        for (var i = 0; i < a.length; i++) {
            let b = new Array(ARRAY_SIZE).fill().map(u => { return []; });
        }
    },
    secondMethod: function(){
        for (var i = 0; i < a.length; i++) {
            let b = new Array(ARRAY_SIZE);
            for (var i = 0; i < ARRAY_SIZE; i++) {
                b[i] = [];
            }
        }
    },
    thirdMethod: function(){
        for (var i = 0, len = a.length; i < len; i++) {
            let b = new Array(ARRAY_SIZE).fill();
            b.forEach((val, i) => {
                b[i] = [];
            })
        }
    },
    fourthMethod: function(){
        for (var i = 0, len = a.length; i < len; i++) {
            let b = Array.from({ length: ARRAY_SIZE }, () => []);
        }
    },
    fifthMethod: function(){
        for (var i = 0, len = a.length; i < len; i++) {
				    let b =  [...Array(ARRAY_SIZE)].map(_=>([]))
        }
    },
    sixMethod: function(){
        for (var i = 0, len = a.length; i < len; i++) {
				    let b = [], total = ARRAY_SIZE;
            while(total--) b.push([]);
        }
    },
};


var runTests = function(){
console.log('test11111111');
    var testTimes = {};
    for(var testName in tests){
        testTimes[testName] = runTest(testName, tests[testName]);
    }
    
    var minTestTime = 10000;
    for(var testName in testTimes){
        var testTime = testTimes[testName];        
        if(testTime < minTestTime){
            minTestTime = testTime;
        }
    }
    
    console.log('\nTest Results:');
    for(var testName in testTimes){
        var testTime = testTimes[testName];        
        if(testTime == minTestTime){
            console.log('  ' + testName + ': ...