in vs hasOwnProperty

JavaScript performance comparison

Test case created by timmywil

Info

Tests which is faster.

Preparation code

<script>
  var attrFn = {
   val: true,
   css: true,
   html: true,
   text: true,
   data: true,
   width: true,
   height: true,
   offset: true
  };
  var name = "data";
</script>

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Testing in unknown unknown
Test Ops/sec
in
name in attrFn;
pending…
hasOwnProperty
attrFn.hasOwnProperty(name);
pending…

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