This webpage use a significant amount of CPU constantly for no apparent reason (as far as I can see it is mostly a static webpage). What the hell ? Is it mining crypto in the background ?
Sorry, this page had a useEffect/setState render loop. We are running react@experimental with concurrent mode, and missed the error. Rolling out a fix now. Thanks!
Quick glance in this case: took a couple second snapshot on the Performance tab and saw a lot of React related calls.