This page's JavaScript has a call to new() in it. To run this test manually, load it in the browser then load the WebInspector and look at the profile. In the profile there should be a call to fakeObject() and Array() in it. Profile title: Using a constructor. Thread_1 (no file) (line 0) startTest constructor.html (line 11) fakeObject constructor.html (line 20) Array (no file) (line 0) endTest profiler-test-JS-resources.js (line 1)