For & Each

for-each.html

<script src="http://code.jquery.com/jquery-1.11.1.min.js"></script>
<script>
    //array arr
    var arr = new Array();
    var i=0;
    for (i; i<100000; i++) {
        arr[i] = i;
    }
    
    //use for
    console.time('for');
    var l = arr.length;
    var i=0;
    for (i;i<l; i++) {
        arr[i] = i;
    }
    console.timeEnd('for');
    
    //use each
    console.time('each');
    $.each (arr, function (i) {
        arr[i] = i;
    });
    console.timeEnd('each');
</script>