delete vs undefined vs null

JavaScript performance comparison

Revision 106 of this test case created by Rick Zhou

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  var o = {
     p: 1
  };
  var m = new Map();
  m.set('p',1);
  
  var s = new Set();
  s.add('p');

};
</script>

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
delete object["property"]
delete o["p"];
pending…
delete object.property
delete o.p;
pending…
delete set
s.delete('p')
pending…
delete map
m.delete('p')
pending…

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Revisions

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