When React.memo actually improves component performance
React.memo can skip unnecessary re-renders, but only under the right prop conditions. This guide shows when it helps, when it doesn’t, and how to verify the impact.
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reactWhen React.memo Actually Helps: Stabilizing Renders Without Premature Optimization
Parent state changes cause whole lists to re-render even when item data is unchanged. Selective memoization with React.memo and useMemo can stabilize renders when props are referentially stable, but only on expensive children with stable inputs.