I’ve been testing out setDOMElement on a private WPT instance to track when a critical part of the page actually shows up. The times being reported for ‘DOM Element’ appears to be wrong. I can reproduce this on webpagetest.org as well, so I’ve data to share.
Check out these test results: http://www.webpagetest.org/result/151111_M5_XQ4/2/details/
I’m left to conclude that setDOMElement doesn’t actually work. If I’m wrong please point out what I’m missing.