React performance is less about one trick and more about a repeatable checklist: measure, isolate, fix, and prevent.
1) Start with profiling (not guessing)
Use React DevTools Profiler.
Find components re-rendering too often.
Confirm renders cause slow frames.
2) Memoization: use it surgically
tsx
Avoid re-creating props
const value = useMemo(() => computeValue(data), [data]); const onClick = useCallback(() => doThing(id), [id]);Want this level of engineering on your product?
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