Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var myObj = {
     "prop1" : { "blank":1 },
     "prop2" : { "blank":1 },
     "prop3" : {"defaults":1,"defaults2":2},
     "prop4" : { "blank":1 }
    };
    
    var cachedProp3 = myObj.prop3;
  };
</script>

Test runner

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(function() {
  return myObj.prop3;
})();

(function() {
  return cachedProp3;
})();

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