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Performance-Optimierungsstrategie für Resonance UI Bibliothek

1. Rendering-Optimierungen​

1.1 Rendering-Strategien​

// Memoization-Beispiel
const MemoizedComponent = React.memo(MyComponent, (prevProps, nextProps) => {
  // Benutzerdefinierte Vergleichslogik
  return (
    prevProps.value === nextProps.value &&
    prevProps.children === nextProps.children
  );
});

// Komplexe Prop-Vergleichsfunktion
function areEqual(prevProps, nextProps) {
  // Tiefgehender Prop-Vergleich
  return Object.keys(prevProps).every(key => 
    isEqual(prevProps[key], nextProps[key])
  );
}

1.2 Lazy Loading​

// Dynamische Komponentenimporte
const LazyComponent = React.lazy(() => 
  import('./HeavyComponent')
);

function App() {
  return (
    <Suspense fallback={<LoadingSpinner />}>
      <LazyComponent />
    </Suspense>
  );
}

2. State-Management-Optimierungen​

2.1 Zustand-Optimierung​

// Effizienter Zustand mit Selector
const useOptimizedStore = create((set, get) => ({
  users: [],
  addUser: (user) => {
    // Immutable Update
    set(state => ({
      users: [...state.users, user]
    }));
  },
  // Selector-Methode
  getUserById: (id) => 
    get().users.find(user => user.id === id)
}));

// Selektiver Render-Hook
function useSelectedUser(userId) {
  const user = useStore(
    state => state.users.find(u => u.id === userId),
    shallow // Flacher Vergleich
  );
  return user;
}

3. Netzwerk-Performance​

3.1 Daten-Caching-Strategie​

// React Query Caching
function useUserData(userId) {
  return useQuery(['user', userId], async () => {
    const response = await fetchUser(userId);
    return response.data;
  }, {
    // Caching-Konfiguration
    staleTime: 5 * 60 * 1000, // 5 Minuten
    cacheTime: 30 * 60 * 1000, // 30 Minuten
    refetchOnWindowFocus: false
  });
}

4. Ressourcen-Management​

4.1 Speicher-Optimierung​

// Effiziente Listen-Rendering
function VirtualizedList({ items }) {
  const { virtualize } = useVirtualization({
    itemHeight: 50,
    overscan: 5
  });

  return (
    <div ref={virtualize}>
      {items.map(item => (
        <ListItem key={item.id} data={item} />
      ))}
    </div>
  );
}

// Garbage Collection Hilfe
function useMemoryOptimizedEffect(callback, deps) {
  const memoizedCallback = useCallback(callback, deps);
  
  useEffect(() => {
    // Cleanup-Mechanismus
    return () => {
      // Explizite Referenz-Löschung
      memoizedCallback = null;
    };
  }, [memoizedCallback]);
}

5. Rendering-Profiling​

5.1 Performance-Monitoring​

// Custom Performance Hook
function useRenderPerformance(componentName) {
  const renderCount = useRef(0);
  const renderTimes = useRef([]);

  useEffect(() => {
    const startTime = performance.now();
    
    return () => {
      const endTime = performance.now();
      const renderDuration = endTime - startTime;
      
      renderCount.current++;
      renderTimes.current.push(renderDuration);

      // Performance-Logging
      if (renderCount.current % 10 === 0) {
        console.log(`${componentName} Performance:`, {
          averageRenderTime: calculateAverage(renderTimes.current),
          totalRenders: renderCount.current
        });
      }
    };
  });
}

6. Code-Splitting-Strategien​

6.1 Dynamische Imports​

// Route-basiertes Code-Splitting
function AppRouter() {
  return (
    <Suspense fallback={<GlobalLoader />}>
      <Routes>
        <Route 
          path="/dashboard" 
          element={lazy(() => import('./Dashboard'))} 
        />
        <Route 
          path="/analytics" 
          element={lazy(() => import('./Analytics'))} 
        />
      </Routes>
    </Suspense>
  );
}

7. Optimierungs-Checkliste​

7.1 Performance-Audit-Kriterien​

  • Erste Renderzeit < 1s
  • Time to Interactive < 100ms
  • Maximale Bundle-Größe: 250 KB
  • CPU-Auslastung < 20%
  • Speichernutzung optimiert

7.2 Kontinuierliche Optimierung​

// Performance-Monitoring Middleware
function performanceMiddleware(store) {
  return (next) => (action) => {
    const start = performance.now();
    const result = next(action);
    const end = performance.now();

    if (end - start > 50) {
      console.warn('Slow action detected', {
        action: action.type,
        duration: end - start
      });
    }

    return result;
  };
}

8. Optimierungs-Tools​

8.1 Empfohlene Tools​

  • React DevTools
  • Chrome Performance Tab
  • Lighthouse CI
  • WebPageTest
  • Bundle Analyzers

9. Webpack/Vite Optimierungen​

9.1 Build-Konfiguration​

// vite.config.js
export default defineConfig({
  build: {
    // Code-Splitting
    rollupOptions: {
      output: {
        manualChunks(id) {
          if (id.includes('node_modules')) {
            return 'vendor';
          }
        }
      }
    },
    // Komprimierung
    minify: 'terser',
    terserOptions: {
      compress: {
        drop_console: true,
        drop_debugger: true
      }
    }
  },
  // Lazy-Loading Unterstützung
  optimizeDeps: {
    include: ['react', 'react-dom']
  }
});

Diese umfassende Strategie bietet einen detaillierten Ansatz zur Performance-Optimierung der React-Bibliothek.