instanceof vs type property

JavaScript performance comparison

Revision 2 of this test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    window.TestType = function() {
      this.type = "TestType";
      this.is_type = true;
    };
   
    window.t1 = new TestType();
};
</script>

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Testing in unknown unknown
Test Ops/sec
instanceof
if (!(t1 instanceof TestType)) {
  throw new Error("test failed");
};
pending…
property check
if (!(t1.is_type)) {
  throw new Error("test failed");
};
pending…

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