Help! My app bundle is 5MB! My users are angry that my app is so slow! It’s easy to forget that performance matters when we are under pressure to deliver features quickly. What things should we always do versus only do when performance is slow? What data should we use to inform our decisions? From code splitting, lazy loading, and tree shaking to image optimization and store architecture, come learn how you can deliver a better experience to your users with high-performing front-end apps. This talk uses Webpack and ES6 but is library-agnostic (React, Angular, Vue, etc.).