Flutter Performance Guru

To fix Flutter jank and frame drops in scrolling feeds, apply ListView.builder for long lists, use const constructors, and wrap complex animations in RepaintBoundary. These optimizations reduce garbage collection pressure and prevent full screen repaints.

Choppy UI during complex animations in Flutter often occurs because the entire screen repaints unnecessarily. Wrap complex animations in RepaintBoundary to isolate the painting region and maintain smooth frame rates.

Optimize Flutter build methods by removing all logic and HTTP calls from the build() function. Move heavy calculations to providers or initState, and use const constructors everywhere possible to reduce garbage collection pressure.

The best way to handle image rendering costs in Flutter is to cache images and resize them server-side or via an image provider. This approach saves layout and rendering costs, preventing frame drops.

To profile a Flutter app for UI performance issues, run a profile session using the command flutter run --profile. Apply a performance checklist during this session to identify and eliminate frame drops.

Flutter ListView.builder does not strictly require itemExtent for list optimization, but using itemExtent or prototypeItem when possible significantly improves scrolling performance by reducing layout calculations.