useMemo, React.memo, useRef, and Custom Hooks — Real-World React Guide
useMemo caches an expensive calculation, React.memo skips unnecessary component re-renders, useRef stores values without causing re-renders, and custom hooks let you reuse stateful logic across components. Together, they make React apps cleaner and faster when used correctly. Quick Difference Tool Main Job Causes Re-render? useMemo Cache a calculated value No React.memo Skip re-render if props do…
useMemo, React.memo, useRef, and custom hooks are powerful tools in React that can optimize app performance. useMemo caches expensive calculations, React.memo avoids unnecessary re-renders, useRef stores mutable values without causing re-renders, and custom hooks enable reusing stateful logic across components. When used correctly, these features can make React apps cleaner and faster.
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