Learn how to track and improve the performance of React applications in this 20-minute conference talk from React Day Berlin 2019. Explore techniques to increase speed, understand the virtual DOM and reconciliation process, and discover how to optimize list rendering. Dive into practical examples, including loading data into tables more efficiently. Gain insights on using React.memo for component optimization and leveraging React Hooks for better performance. Perfect for React developers looking to enhance their applications' speed and responsiveness.