This page calls a NodeList as a function (e.g., list(0)). To run this test manually, load it in a debug build in the browser. You should see a (NodeList object) entry in the profile. Profile title: Call NodeList as function Thread_1 (no file) (line 0) startTest call-nodelist-as-function.html (line 11) getElementsByTagName (no file) (line 0) (NodeList object) (no file) (line 0) endTest profiler-test-JS-resources.js (line 1)