Learn how to optimize your React application's performance through code splitting in this insightful conference talk from React Conf 2017. Explore the concept of mobile-first development, browser support considerations, and techniques for shipping less JavaScript. Discover the benefits of long-term caching and dive into practical examples of code splitting implementation. Master async React components and lazy loading strategies, including route-level and component-level splitting. Understand how to effectively use conditional imports and avoid common pitfalls like mismatches and waterfalls. Gain valuable insights on profiling your app on real devices and optimizing your code for better user experience.