A Flutter application usually feels fast during early development. Animations look smooth, interactions feel responsive, and the UI behaves exactly as expected. But performance often tells a different story once the application grows, screens become more complex, and real devices enter the testing process. This is where Flutter performance optimization becomes a real engineering concern rather than a theoretical one. Developers start noticing frame drops, animation stutters, and occasional interface lag. These issues are often grouped under a common label: UI jank. Flutter itself is not the problem. The Flutter framework was designed specifically to render smooth interfaces across platforms. The real challenge comes from how the Flutter Engine, the graphics rendering pipeline, and the underlying GPU drivers interact with the application. That interaction is exactly why the Impeller Rendering Engine was introduced. Historically, Flutter relied on the Skia Graphics Library to render UI elements.…