kangax/gist:c36ea485926806020024 Secret

## gistfile1.htm
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
  "http://www.w3.org/TR/html4/strict.dtd">
<html>
  <head>
    <meta http-equiv="Content-type" content="text/html; charset=utf-8">
    <title></title>
  </head>
  <body>
    <script type="text/javascript">
      (function(){

        var o1 = {
          o2: {
            o3: {
              o41: 1,
              o42: false
            }
          }
        };

        function testWith() {
          with (o1.o2.o3) {
            o41;
            o42;
          }
        }
        function testFullPropAccess() {
          o1.o2.o3.o41
          o1.o2.o3.o42;
        }
        function testAliasedPropAccess() {
          var o = o1.o2.o3;
          o.o41;
          o.o42;
        }

        var lim = 500000;

        var t = new Date();
        for (var i=lim; i--; ) {
          testWith();
        }
        var t1 = new Date() - t;

        t = new Date();
        for (var i=lim; i--; ) {
          testFullPropAccess();
        }
        var t2 = new Date() - t;

        t = new Date();
        for (var i=lim; i--; ) {
          testAliasedPropAccess();
        }
        var t3 = new Date() - t;

        document.write('t1: ' + t1 + 'ms<br>t2: ' + t2 + 'ms<br>t3: ' + t3 + 'ms');
      })();
    </script>
  </body>
</html>
	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
	"http://www.w3.org/TR/html4/strict.dtd">
	<html>
	<head>
	<meta http-equiv="Content-type" content="text/html; charset=utf-8">
	<title></title>
	</head>
	<body>
	<script type="text/javascript">
	(function(){

	var o1 = {
	o2: {
	o3: {
	o41: 1,
	o42: false
	}
	}
	};

	function testWith() {
	with (o1.o2.o3) {
	o41;
	o42;
	}
	}
	function testFullPropAccess() {
	o1.o2.o3.o41
	o1.o2.o3.o42;
	}
	function testAliasedPropAccess() {
	var o = o1.o2.o3;
	o.o41;
	o.o42;
	}

	var lim = 500000;

	var t = new Date();
	for (var i=lim; i--; ) {
	testWith();
	}
	var t1 = new Date() - t;

	t = new Date();
	for (var i=lim; i--; ) {
	testFullPropAccess();
	}
	var t2 = new Date() - t;

	t = new Date();
	for (var i=lim; i--; ) {
	testAliasedPropAccess();
	}
	var t3 = new Date() - t;

	document.write('t1: ' + t1 + 'ms<br>t2: ' + t2 + 'ms<br>t3: ' + t3 + 'ms');
	})();
	</script>
	</body>
	</html>