<script>
  var i, values = [],
      sum = 0;
  for (i = 0; i < 10000; i++) {
   values[i] = i;
  }
  
  function add(val, index) {
   sum += val + index;
  }

   Array.prototype.CustomForEach = function(fn) {
       for (var i = 0, n = this.length; i < n; ++i)
           fn(this[i], i);
   };

   Array.prototype.CustomForEachCacheRef = function(fn) {
       var a = this;
       for (var i = 0, n = a.length; i < n; ++i)
           fn(a[i], i);
   };
</script>

Setup JS

Teardown JS

Test cases

Test #1

Title *

Async

Code *values.forEach(add);

Test #2

Title *

Async

Code *

for (var i = 0, n = values.length; i < n; ++i) {
  add(values[i], i);
}

Test #3

Title *

Async

Code *values.CustomForEach(add);

Test #4

Title *

Async

Code *values.CustomForEachCacheRef(add);

Test case details

Preparation Code

Test cases

Test #1

Test #2

Test #3

Test #4