React Performance Optimization

Performance workflow

1. Measure with React DevTools Profiler
2. Identify bottlenecks
3. Apply targeted optimizations
4. Re-measure and validate impact

Common optimizations

• React.memo for stable pure components
• useMemo for expensive derived values
• useCallback for stable callbacks
• List virtualization for large datasets
• Route-level code splitting with lazy and Suspense

Code splitting example

const AdminPage = lazy(() => import('./pages/AdminPage'));

<Suspense fallback={<p>Loading...</p>}>
  <AdminPage />
</Suspense>

Anti-patterns

• Premature memoization everywhere
• Massive components with mixed responsibilities
• Heavy computations during render

Next, we will deploy React apps to production.