map vs for-loop performance

JavaScript performance comparison

Revision 9 of this test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var arr = new Array();
    for (var i = 0; i < 10000; i++) {
      arr[i] = i;
    }
   
    function multReturn(x) {
      return x * x;
    }
};
</script>

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Testing in unknown unknown
Test Ops/sec
map
arr.map(multReturn);
pending…
for
for (var i = 0, len = arr.length; i < len; i++) {
  arr[i] = multReturn(arr[i]);
}
pending…

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