Answer
React caches derived values via memoized selectors and fine-grained subscriptions.
Quick Answer
useSyncExternalStore and libraries like Jotai/Zustand expose stable selectors — only components using a specific slice subscribe to changes in that slice. With concurrent rendering, Redux and Context use subscription models that check current vs previous values before re-rendering. Memoized selectors that return stable references prevent cascade re-renders.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ