Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var foo = function(){},
        _p = "prototype", 
        _c = "constructor";
    
    foo.prototype = {};
    
    foo.prototype.constructor = foo;
    
    foo.bar = "baz";
    
  };
</script>

Test runner

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var test = foo.prototype.constructor.bar;

var test = foo[_p][_c].bar;

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