delete vs undefined vs null

JavaScript performance comparison

Revision 124 of this test case created by Mike Lysikov

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  function omit(source, keyToOmit) {
    const {[keyToOmit]: toRemove, ...rest} = source;
    return rest;
  }
  
  var o = {};
  

};
</script>

Test runner

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
omit(object, 'keyToOmit');
o.p = undefined;
omit(o, 'p');
pending…
object.property = false
o.p = undefined;
o.p = false;
pending…
delete object["property"]
o.p = undefined;
delete o["p"];
pending…
object["property"] = false
o.p = undefined;
o["p"] = false;
pending…
object.property = null
o.p = undefined;
o.p = null;
pending…
object.property = undefined
o.p = undefined;
o.p = undefined;
pending…
delete object.property
o.p = undefined;
delete o.p;
pending…

Revisions

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