hasOwnProperty

JavaScript performance comparison

Test case created by Tom Robinson

Preparation code

<script>
  a = {
   b: true
  };
</script>

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Testing in unknown unknown
Test Ops/sec
a["b"]
if (a["b"]) {
}
pending…
a.hasOwnProperty("b")
if (a.hasOwnProperty("b")) {
}
pending…
Object.prototype.hasOwnProperty.call(a, b)
if (Object.prototype.hasOwnProperty.call(a, "b")) {}
pending…
"b" in a
if ("b" in a) {}
pending…
a.b
if (a.b) {}
pending…

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