What does a few dropped frames mean when your Flutter app is used by a million people? We'll look at a real-world Flutter app, understand where the jank came from, and see how Flutter's rendering works with Skia and Impeller. We'll cover why Impeller was introduced, how it handles rendering and shaders differently, and what that means for app performance. 1. Identify what causes jank and understand the Flutter frame rendering pipeline. 2. Explain the key differences between Skia and Impeller and why Flutter moved toward Impeller. 3. Understand how Impeller addresses rendering and shader-related performance issues. 4. Use Flutter DevTools to reason about rendering performance and frame issues. 5. Enable and verify Impeller in a Flutter application and understand what it can—and cannot—solve.