The web platform is powerful and performant, and custom elements are a profound new platform primitive. Polymer is a library that helps developers realize the potential of the platform to please and delight users. From paradigms to pointers we review a plethora of concepts and examples to make sure you’re prepared to write applications that are truly paragons of performance. Missed the summit? Catch the recordings at: https://www.polymer-project.org/summit Or watch more videos here: https://goo.gl/XDWHzT Subscribe to the channel: https://youtube.com/chromedevelopers Find out more here: *Practical Performance* RAIL: https://developers.google.com/web/fundamentals/performance/rail www.webpagetest.org PRPL: https://www.youtube.com/watch?v=J4i0xJnQUzU https://developers.google.com/web/fundamentals/performance/prpl-pattern/ Polydev: https://chrome.google.com/webstore/detail/polymer-devtools-extensio/mmpfaamodhhlbadloaibpocmcomledcg Polyperf, ratings-element: https://github.com/polymerlabs/polyperf/tree/ratings-element Music by Terra Monk: https://goo.gl/9BkpNH