For vs Each

JavaScript performance comparison

Test case created by Kent

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>
<script>
Benchmark.prototype.setup = function() {
    var myobj = {
      one: {
        a: "1",
        b: "2"
      },
      two: {
        c: "3",
        d: "4"
      }
    };
};
</script>

Test runner

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Testing in unknown unknown
Test Ops/sec
For-In
for (var item in myobj) {
  obj = myobj[item];
  for (var result in obj) {
    console.log(obj['a']);
  }
}
pending…
jQ-Each
$.each(myobj, function(obj, result) {
  console.log(result['a']);
});
pending…

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