Have you ever clicked a button in a React application and noticed that components you didn't touch were rendering again? Maybe a dashboard feels sluggish when updating a counter. Perhaps a large list becomes slow when typing into a search field. Or maybe you've added React. memo, useMemo, and useCallback , but the performance hasn't improved much. These problems are common in React applications, but the solution isn't to add memoization everywhere. The first step is to identify what...