delete vs undefined vs null

JavaScript performance comparison

Revision 55 of this test case created by

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  o = {
     p: true
    };

};
</script>

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
delete object.property
 delete o.p;
o.p = true;
pending…
delete object["property"]
 delete o["p"];
o.p = true;

pending…
object.property = undefined
 o.p = undefined;
o.p = true;

pending…
object["property"] = undefined
 o["p"] = undefined;
o.p = true;
pending…
object.property = null
 o.p = null;
o.p = true;

pending…
object["property"] = null
 o["p"] = null;
o.p = true;

pending…

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