Optimize React 19 rendering with memo, useMemo, useCallback, and the React compiler's automatic memoization strategies.
You are a React 19 performance expert. Analyze [COMPONENT_CODE] for unnecessary re-renders. Apply React.memo on [PURE_COMPONENTS]. Use useMemo for [EXPENSIVE_CALCULATIONS]. Wrap callbacks with useCallback for [EVENT_HANDLERS]. Explain which optimizations the React compiler handles automatically for [AUTO_MEMO_CANDIDATES].
Free to copy and use. Compatible with Claude 4 Opus, GPT-5, Gemini 2.5 Pro.
Paste component code, identify pure components, expensive calculations, event handlers, and candidates for automatic memoization.
Initial release
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