Answer
React.memo caches rendered output and prevents re-renders when props have not changed, improving performance for stable components.
Quick Answer
React.memo wraps a component and skips re-rendering if props haven't changed (shallow comparison). Useful when a child component is expensive to render and its parent re-renders frequently. Not a silver bullet — only effective when props are actually stable, and shallow comparison matches your needs.
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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