React Render Optimization

Modern render performance patterns for React 19+.

Decision Tree: React Compiler First (2026)

Is React Compiler enabled?
├─ YES → Let compiler handle memoization automatically
│        Only use useMemo/useCallback as escape hatches
│        DevTools shows "Memo ✨" badge
│
└─ NO → Profile first, then optimize
         1. React DevTools Profiler
         2. Identify actual bottlenecks
         3. Apply targeted optimizations

React Compiler (Primary Approach)