Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
 
<script>
  Benchmark.prototype.setup = function() {
    
    var win = window
      , $window = $(window)
      , docElem = document.documentElement
      , normalizedDocElem = isFinite(docElem.scrollTop) ? docElem : document.body
      , scrollY = isFinite(win.pageYOffset) ? function() { return win.pageYOffset; }
                   : function() { return normalizedDocElem.scrollTop; }
      , $scrollY = $window.scrollTop
    ;//var
  };
</script>

Preparation code output

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scrollY();

$scrollY();

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