chrome/test/data/read_cookies.html

   1 <html>
   2 <body>
   3 <pre>
   4 <script>
   5
   6 // This script tests the performance of reading cookies.  It sets a cookie and
   7 // then reads cookies N times.  Finally, it outputs the average time taken to
   8 // read the cookie.
   9
  10 document.cookie =
  11   'one_heck_of_a_crazy_cookie_name=1234567890.1234567890.1234567890.1234567890';
  12
  13 var ok = true;
  14
  15 var num_iters = document.location.search.substring(1) - 0;
  16 if (num_iters == 0)
  17   num_iters = 10000;
  18 document.writeln("num_iters: " + num_iters);
  19
  20 var ts = (new Date()).getTime();
  21
  22 // read the cookie num_iters times
  23 for (var i = 0; i < num_iters; ++i) {
  24   var d = document.cookie;
  25 }
  26
  27 var te = (new Date()).getTime();
  28
  29 var time_per_read = (te - ts) / num_iters;
  30 document.writeln("time per read: " + time_per_read.toFixed(3) + " msec");
  31
  32 </script>
  33 </pre>
  34 </body>
  35 </html>