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<!-- Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/publicdomain/zero/1.0/ -->
<!doctype html>

<html>
  <head>
    <meta charset="utf-8"/>
    <title>Performance test page</title>
  </head>

  <body>
    <script type="text/javascript">
      var x = 1;
      function test() {
        document.body.style.borderTop = x + "px solid red";
        x = 1^x;
        document.body.innerHeight; // flush pending reflows
      }

      // Prevent this script from being garbage collected.
      window.setInterval(test, 1);
    </script>
  </body>

</html>