Using useCallback in React optimizes performance by memoizing functions, preventing unnecessary re-creation and reducing child component re-renders that depend on function props. As the creator of CoreUI, a widely used open-source UI library, I’ve implemented useCallback in countless React components to optimize performance in complex dashboard interfaces and data-heavy applications. From my expertise, the most effective approach is wrapping event handlers and callback functions with useCallback and proper dependency arrays. This method provides significant performance improvements for components with expensive child renders or frequent updates.