for-in VS getOwnPropertyNames and forEach

JavaScript performance comparison

Revision 4 of this test case created

Preparation code

<script>
  var guy = {
    foo: 'bar',
    qux: 'qax'
  }
</script>

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Testing in unknown unknown
Test Ops/sec
for-in
for (item in guy) {
  guy.hasOwnProperty(item) && guy[item];
}
pending…
getOwnPropertyNames and forEach
Object.getOwnPropertyNames(guy).forEach(function(item) {
  guy[item];
});
pending…

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