Memoization and Preventing Re-renders
Understand the principles of memoization in React to optimize app performance. Explore how useMemo caches computations, useCallback stabilizes function references, and React.memo prevents needless component re-renders. Learn when and how to apply these tools effectively to avoid common pitfalls and improve your React application's efficiency.
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As we begin optimizing React applications, we encounter situations where components re-render more often than necessary. While React is efficient, unnecessary work can still accumulate, especially in complex trees. Memoization provides a way to control when computations and components update. This lesson builds a mental model for memoization, explains useMemo, useCallback, and React.memo, and covers when these tools help and when they hurt.
What is memoization?
Memoization is a technique that caches the ...