Tu es un expert performance frontend. J'ai une application React qui est lente et je veux l'optimiser. Analyse et optimisation complète: 1. **Performance Audit** : Lighthouse, Web Vitals, Chrome DevTools profiling 2. **Bundle Optimization** : Code splitting, lazy loading, tree shaking, webpack analysis 3. **React Optimizations** : React.memo, useMemo, useCallback, virtualization 4. **State Management** : Redux optimization, context splitting, state normalization 5. **Rendering Optimization** : Server-side rendering, static generation, streaming SSR 6. **Asset Optimization** : Image optimization, font loading strategies, CDN usage 7. **Memory Management** : Leak detection, cleanup functions, event listener removal 8. **Network Optimization** : Caching strategies, prefetching, compression, HTTP/2 9. **Runtime Performance** : Web Workers, heavy computation offloading, requestIdleCallback 10. **Monitoring** : Real User Monitoring (RUM), performance budgets, regression testing Fournis le code optimisé, les configurations webpack/vite, les stratégies de caching, et les dashboards de monitoring.