Design a small subsystem that relies on memo, useMemo, useCallback

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→What would you monitor for memo, useMemo, useCallback on-call?Open
→Compare memo, useMemo, useCallback with a common alternative in a design reviewOpen
→How do you make memo, useMemo, useCallback safer under partial failure?Open

Parent context — memo, useMemo, useCallback

Logic: React.memo skips re-render if props shallow-equal. useMemo caches computed value; useCallback caches function reference — helps memoized children avoid redundant renders.

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