Passing data between screens in Flutter is lightweight and fast. It uses memory efficiently because only references or small data objects are passed, not entire screens. This keeps frame rates smooth at 60fps or higher. However, passing very large data objects can increase memory use and slow down navigation animations, affecting user experience.
To keep navigation smooth at 60fps, pass only necessary data between screens. Use simple data types or small objects. Avoid passing large images or heavy data directly; instead, pass references like IDs and load data asynchronously on the new screen. Use Flutter's Navigator efficiently and avoid rebuilding entire widget trees unnecessarily during navigation.
Passing data between screens does not significantly affect app bundle size or startup time. The code for navigation and data passing is minimal. However, if you pass large assets or include heavy dependencies to support data handling, it can increase app size. Keep data models simple and load large resources on demand to maintain fast startup.
Flutter abstracts navigation and data passing, so the code works the same on iOS and Android. However, platform-specific behaviors like back button handling differ: Android has a physical back button, while iOS uses swipe gestures or navigation bars. Ensure your data passing logic handles these navigation differences gracefully to avoid unexpected app states.
Your app takes 5 seconds to load this screen after navigation. What's likely wrong?