Test JS loop speed

test.js

var N = 100000,
	array = Array.apply(null, {length: N}).map(Function.call, Math.random),
	max = 0,
	start = new Date().getTime(),
	len = array.length;

for(var i=0; i<len; i++) {
	max = Math.max(max, array[i]);
}

var end = new Date().getTime();
console.log(max);
console.log('pre-calc length: '+(end-start)+' msec');


max = 0;
start = new Date().getTime();

for(var i=0; i<array.length; i++) {
	max = Math.max(max, array[i]);
}

var end = new Date().getTime();
console.log(max);
console.log('no-calc length: '+(end-start)+' msec');