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Advanced use cases for useMemo in React Native


To use `useMemo` effectively in React Native, follow these advanced use cases:

1. Optimizing Performance:
- Use `useMemo` to memoize expensive computations or data fetching. This ensures that the result is only recalculated when the dependencies change, reducing unnecessary computations and improving performance[1][2][3].

2. Memoizing Functions:
- Use `useMemo` to memoize functions that don't depend on component state. This is particularly useful when passing callback functions as props to child components[1][2][3].

3. Managing Complex State:
- Use `useMemo` to manage complex state that depends on multiple values. This ensures that the state is only recalculated when any of the dependencies change[1][2][3].

4. Memoizing Derived Data:
- Use `useMemo` to memoize derived data that depends on other values. This ensures that the derived data is only recalculated when the dependencies change, reducing unnecessary computations and improving performance[1][2][3].

5. Optimizing Rendering Performance:
- Use `useMemo` to optimize rendering performance by memoizing values that don't change between renders. This ensures that the component re-renders only when the dependencies change[1][2][3].

6. Enhancing User Experience:
- Use `useMemo` to enhance user experience by memoizing values that are used in multiple places. This ensures that the values are only recalculated when the dependencies change, reducing unnecessary computations and improving performance[1][2][3].

7. Combining with Other Hooks:
- Use `useMemo` in combination with other hooks like `useState` and `useEffect` to manage complex state and side effects efficiently[1][2][3].

8. Custom Hooks:
- Use `useMemo` within custom hooks to memoize values across components. This ensures that the fetched data is only recalculated when the URL changes, preventing unnecessary API calls and improving performance across components[2][3].

9. Performance Monitoring:
- Use performance monitoring tools to measure the impact of `useMemo` on your application's performance and adjust accordingly[2][3].

10. Best Practices:
- Identify expensive computations and choose the right dependencies. Avoid unnecessary memoization and measure performance to optimize the use of `useMemo`[1][2][3].

By following these advanced use cases and best practices, you can effectively use `useMemo` in React Native to optimize performance, manage complex state, and enhance user experience.

Citations:
[1] https://dev.to/kirubelkinfe/mastering-usememo-in-react-with-typescript-4-different-use-cases-for-usememo-5gal
[2] https://www.freecodecamp.org/news/how-to-work-with-usememo-in-react/
[3] https://codedamn.com/news/reactjs/usememo-and-usecallback-hooks
[4] https://react.dev/reference/react/useMemo
[5] https://blog.logrocket.com/react-usememo-vs-usecallback/