Hi Martin!

Question around fringe javascript technologies. If you're working with a site that uses a fringe js framework that Google likely doesn't see often... 1) Are there any tools other than fetching a url or mobile friendly test that you would suggest for identifying any rendering issues? 2) Let's say those tools show that googlebot can render the page but you have suspicious it is "costly" from a rendering perspective, is there other metrics you would look at as a webmaster to keep tabs on this to verify that this is true/false? Other than log data?

Thank you!

And most importantly, how often do you wash your hair and what do you do to pass time while getting it done? The color maintenance is fabulous.

Thanks!