Using default props in React Native helps avoid unnecessary re-renders by ensuring components always have valid values. This can keep your app running smoothly at 60 frames per second (fps) by preventing errors or extra checks during rendering. Default props themselves have minimal memory impact since they are simple static values.
Define default props outside of the render function to avoid recreating them on every render. Use simple, primitive default values to keep memory usage low. Avoid complex objects or functions as default props unless memoized, as they can cause unnecessary re-renders and slow down UI updates.
Default props add negligible size to your app bundle because they are small static values. They do not affect startup time noticeably. Using default props can reduce runtime errors, which helps your app start and run reliably without crashes or delays.
Default props behave the same on iOS and Android since React Native uses JavaScript for logic. However, platform-specific default props can be set if needed to handle UI differences. For example, default font sizes or colors might differ slightly between platforms to match native styles.
Using default props helps ensure your app does not crash due to missing values, which aligns with Apple App Store and Google Play guidelines requiring stable and crash-free apps. Proper default props contribute to accessibility by providing fallback values for UI elements, supporting compliance with accessibility standards.
If your screen uses components with missing props and no default props, it may cause errors or slow rendering. Check if default props are missing or if complex default values cause extra processing. Adding simple default props can prevent delays and improve load time.