Testing Speed of Adding Commas to a number

AddCommasToNumber.js

var testNumber = 3453453453434
var tests = 10000;

//Test 1
setTimeout(function(){
    var time = performance.now()
    for(var i = 0; i < tests; i++)
        numberAddComma(testNumber)
    
    console.log('Function: ' + (performance.now() - time))
}, 100);

//Test 2
setTimeout(function(){
    var time = performance.now()
    for(var i = 0; i < tests; i++)
        numberAddComma2(testNumber)
    
    console.log('Regular Ex: ' + (performance.now() - time))
}, 500);

//Test 3
setTimeout(function(){
    var time = performance.now()
    for(var i = 0; i < tests; i++)
        numberAddComma3(testNumber)
    
    console.log('To Local String: ' + (performance.now() - time))
}, 1000)


function numberAddComma(theNumber){
	var returnNumber = ''
	theNumber = theNumber.toString().split('').reverse()
	var i = theNumber.length; while(i--){
		returnNumber = returnNumber + theNumber[i] + (i !== 0 && i % 3 == 0 ? ',' : '')
	}
	return returnNumber
}

function numberAddComma2(theNumber){
	return theNumber.toString().replace(/\B(?=(\d{3})+\b)/g, ",")
}

function numberAddComma3(theNumber){
	Number(theNumber).toLocaleString()
}