Options for optimizing caching in React
Blog post from LogRocket
React, a popular frontend library for building performant web applications, primarily operates on a component-based approach where each component manages its own state and logic. Optimizing React applications involves several strategies to minimize unnecessary renders that can compromise performance, especially in larger applications. Key techniques include using React's Hooks like useMemo() and useCallback() for memoization to cache computations and functions, thereby reducing CPU load. Lazy loading components delays rendering non-essential elements until necessary, which is particularly effective in large applications. The useRef() Hook allows for tracking state changes without triggering re-renders, while Redux cached selectors, facilitated by libraries like Reselect, optimize data retrieval by avoiding redundant computations. React Query enhances API call efficiency by caching data and preventing unnecessary re-renders when data remains unchanged. React fragments reduce extra DOM elements, improving render performance, and virtual lists efficiently manage large data sets by only rendering visible items. Finally, adopting functional components over class-based ones offers a more lightweight and faster alternative, contributing to decreased bundle sizes and improved application speed.