Test case details

Preparation Code

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"> </script> <script src="http://documentcloud.github.com/underscore/underscore-min.js"> </script> <script>   var arr = [],       loop = 5000;     var fn = function(x) {       x = x;       }; </script>

Test cases

Test #1

for (var i in arr) {   fn(arr[i]); }

Test #2

for (var i in arr) {   if (arr.hasOwnProperty(i)) {     fn(arr[i]);   } }