Preparation code

<script src="//sjhcockrell.s3.amazonaws.com/downloads/belt.min.js"></script>
<script src="//zeptojs.com/zepto.min.js"></script>
<script>
  Benchmark.prototype.setup = function() {
    var a = [],
        i = -1,
        o = {};
    
    while (++i < 10000) {
       a[i] = i;
       o[i] = i;
    }
    
    function manipulate(value, key, obj) {
      return value * 11;
    }
  };
</script>

Preparation code output

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B.forEach(a, manipulate);

$.each(a, function(i,v){ manipulate(v,i); });

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