array.forEach running faster than native iteration? How?

Question

http://jsperf.com/testing-foreach-vs-for-loop

It was my understanding that Test Case 2 should run more slowly than Test Case 1 -- I wanted to see how much more slowly. I

Answer 1

Maybe the for() is slower because the loop applies 'array.length' to each iteration, to get the array's length.

Try:

var nri = array.length;
for( var i = 0; i < nri; i++ ){
   // ...
}