What are the performance differences between class and functional components in React?

What are the performance differences between class and functional components in React?

Class components in React can have more overhead due to lifecycle methods and state management, while functional components are generally lighter and can leverage hooks for state and side effects.

Are functional components always faster?

Not necessarily. While functional components are often more efficient, performance can vary based on how they are implemented and the complexity of the component.

What about memoization? How does it affect performance?

Memoization can significantly improve performance in functional components by preventing unnecessary re-renders. Using React.memo or useMemo can help optimize rendering.

Can you give an example of when to use class components?

Class components might be preferred when you need to manage complex state or lifecycle methods that are not easily handled by hooks.