Answer
Memo adds comparison overhead. Often re-rendering is cheaper than shallow comparisons.
Quick Answer
React.memo adds comparison overhead on every parent render — it compares all props with Object.is. For cheap components that rarely have prop changes, this comparison costs more than just re-rendering. It also requires stabilizing all props with useCallback/useMemo, adding maintenance burden. Profile first; memoize only confirmed bottlenecks.
S
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