Fun fact In a previous company we were building a session replay tool, and as you may know it is pretty complex to evaluate the impact of the single script on

Fun fact In a previous company we were building a session replay tool, and as you may know it is pretty complex to evaluate the impact of the single script on a page. The only way we found to test the impact of the script was to execute it on a page with the most mutations on an event, and try to see how much the event was impacted. The only place where we found a heavy use of mutations was the hackernews page that had more than 100 comments in a thread. And the first time we tested, we tripled the time to collapse the thread