third_party/WebKit/PerformanceTests/Bindings/named-property-enumerator.html

   1 <!DOCTYPE html>
   2 <html>
   3 <body>
   4 <script src="../resources/runner.js"></script>
   5 <script>
   6 var div = document.createElement("div");
   7 for (var i = 0; i < 1000; i++) {
   8     var key = "key_" + i;
   9     var value = "value_" + i;
  10     div.dataset[key] = value;
  11 }
  12 function assertEquals(a, b) {
  13     if (a !== b) console.log("assertion failed: not equal", a, b);
  14 }
  15 var i = 0;
  16 for (var key in div.dataset) {
  17     var ref_key = "key_" + i;
  18     var ref_value = "value_" + i;
  19     assertEquals(key, ref_key);
  20     assertEquals(div.dataset[key], ref_value);
  21     i++;
  22 }
  23
  24 PerfTestRunner.measureRunsPerSecond({
  25     description: "This benchmark covers enumerator of named properties",
  26     run: function() {
  27         for (var key in div.dataset);
  28 }});
  29 </script>
  30 </body>
  31 </html>