𝟱 𝗥𝗲𝗮𝗰𝘁 𝗝𝗦 𝗧𝗿𝗶𝗰𝗸𝘀 𝗳𝗼𝗿 𝗙𝗮𝘀𝘁𝗲𝗿 𝗔𝗽𝗽𝘀 𝗶𝗻 𝟮𝟬𝟮𝟲

𝟱 𝗥𝗲𝗮𝗰𝘁 𝗝𝗦 𝗧𝗿𝗶𝗰𝗸𝘀 𝗳𝗼𝗿 𝗙𝗮𝘀𝘁𝗲𝗿 𝗔𝗽𝗽𝘀 𝗶𝗻 𝟮𝟬𝟮𝟲

Slow React apps lose users. Slow load times hurt your SEO. Use these five tips to fix your speed.

• Stop using useMemo and useCallback for small tasks. They add overhead. Use them for heavy math. Use React.memo on child components. Use React DevTools to find slow parts. Do not guess.

• Do not send your whole app in one bundle. Use React.lazy and Suspense. Split code by routes. Load heavy parts like maps or editors only when needed.

• Long lists kill performance. Rendering thousands of nodes slows the browser. Use @tanstack/react-virtual. It shows only items on the screen. Use this for lists over 100 items.

• Global state causes too many re-renders. Move state closer to where you use it. This is state collocation. Use Zustand or Jotai for shared state.

• Use useTransition and useDeferredValue. These mark updates as non-urgent. Your UI stays snappy during heavy filters or searches.

Measure with DevTools. Find the slow spot. Fix it. Measure again.

Source: https://dev.to/aamir_dev/5-react-js-tricks-to-improve-site-speed-and-efficiency-in-2026-4ck3