(Until YouTube allows replacing videos, audio issues are fixed at https://vimeo.com/306801457) Slides: https://www.slideshare.net/tammyeverts/how-i-learned-to-stop-worrying-and-love-ux-metrics About Tammy: https://twitter.com/tameverts More about performance.now(); https://perfnow.nl or https://twitter.com/perfnowconf Receive conference announcements in your inbox: https://perfnow.nl/subscribe