Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    Object.defineProperty(Number.prototype, 'prop1', {
      get: function () { return this }, configurable: true
    })
    Number.prototype.meth1 = function() { return Number( this ) };
    
    var num = 123456789;
  };
</script>

Test runner

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var x = num.meth1();

var x = num.prop1;

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