Improving Performance of Phoenix LiveView in Realtime Elixir Applications

Marlus Saraiva provides insight into optimizing Phoenix LiveView applications, particularly for those requiring frequent updates. He explains that most of LiveView's efficiency comes from tracking changes in templates and component assigns. For most applications, developers won't have to concern themselves with these details. However, for real-time applications with frequent updates, understanding and leveraging these concepts is crucial to prevent performance issues. Saraiva discusses the difference between live components and stateless function components in terms of change tracking. He also emphasizes the importance of minimizing dynamic content, using components over function calls, applying CSS-in-JS strategies like Tailwind variants, and being careful with stateless function components that might cause unnecessary re-renders. Important optimizations include minimizing dynamic parts, reducing re-rendering by passing only essential data to components, and batching PubSub messages to avoid overwhelming the application with updates that users can't perceive. He also teased upcoming LiveView features without divulging details, as these would be covered in another presentation by Chris McCord.