directagainstclosure

JavaScript performance comparison

Test case created by test

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var obj = [1, 2, 3, 4, 5];
   
    function iter() {
      for (var key in obj) {
        key = key + key;
      };
    };
};

Benchmark.prototype.teardown = function() {
    obj = null;
    iter = null;
};
</script>

Test runner

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Testing in unknown unknown
Test Ops/sec
direct
iter(obj);
pending…
closure
(function iter(obj) {
  for (var key in obj) {
    key = key + key;
  };
})(obj);
pending…

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