We demand high performance web applications. To build them we need every single piece of information to help us find actionable ways of speeding up our applications. In this session learn how to use the performance API together with common browser performance tooling to determine down to the method level how long our pages take to perform operations. We’ll also touch briefly on instrumenting up popular frameworks such as React & Angular, running performance checks on mobile browsers, and free open source tools that can help you diagnose and monitor performance.