How to optimize Flutter app performance?

Flutter performance optimization:\n\n**Widget optimization:**\n• Use const constructors\n• Avoid rebuilding expensive widgets\n• Use RepaintBoundary for complex widgets\n• Implement shouldRebuild in custom widgets\n\n**List optimization:**\n\n// Use ListView.builder for large lists\nListView.builder(\n itemCount: items.length,\n itemBuilder: (context, index) {\n return ListTile(title: Text(items[index]));\n }\n)\n\n// Use ListView.separated for dividers\nListView.separated(\n itemBuilder: (context, index) => ItemWidget(items[index]),\n separatorBuilder: (context, index) => Divider(),\n itemCount: items.length\n)\n\n\n**Image optimization:**\n• Use appropriate image formats\n• Implement image caching\n• Use Image.network with cacheWidth/cacheHeight\n• Compress images\n\n**Memory management:**\n• Dispose controllers and streams\n• Use weak references\n• Avoid memory leaks in listeners\n\n**Build optimization:**\n• Use --release mode for production\n• Enable code splitting\n• Tree shaking for smaller bundles\n• Profile app with Flutter Inspector\n\n**Animation optimization:**\n• Use Transform instead of changing layout\n• Prefer Opacity over rebuilding\n• Use RepaintBoundary for animations