third_party/WebKit/PerformanceTests/DOM/modify-element-classname.html

   1 <!DOCTYPE html>
   2 <html>
   3 <body>
   4 <script src="../resources/runner.js"></script>
   5 <script>
   6 var element;
   7
   8 PerfTestRunner.measureTime({
   9     description: "Measures performance of changing a DOM element's className property.",
  10
  11     setup: function() {
  12         element = document.createElement('div');
  13     },
  14
  15     run: function() {
  16         for (var i = 0; i < 500000; ++i) {
  17             element.className = 'class1';
  18             element.className = 'class2';
  19         }
  20     }
  21 });
  22 </script>
  23 </body>
  24 </html>