Bug 79208

I am planning to add performance tests for DOM attribute getters and setters in order to catch a performance regression in JavaScriptCore/V8 bindings, like bug 76492. I would like to add the following two tests for each DOM attribute in HTMLElement.idl, Element.idl and Node.idl, which will most impact on the DOM performance in the real Web: PerfTestRunner.run(function() { var div = document.createElement("div"); for (i = 0; i < repeatTimesOfGetter; i++) div.id; } PerfTestRunner.run(function() { var div = document.createElement("div"); for (i = 0; i < repeatTimesOfSetter; i++) div.id = "foo"; } Actually, a setter traces a different call path depending on whether the assigned string is an empty, one character, or more than one characters. However, I guess that the test case worth adding would be just a string composed of more than one characters (e.g. "foo").