066eb8f820
Music Creation Page: - Vinyl 3D flip to view lyrics, tonearm animation, glow rotation effect - Circular SVG progress ring, speech bubble feedback, confirm dialog - Playlist modal, free creation input, lyrics formatting optimization - MiniMax API real music generation with SSE streaming progress Backend: - FastAPI proxy server.py for MiniMax API calls - Music + lyrics file persistence to Capybara music/ directory - GET /api/playlist endpoint for auto-building playlist from files UI/UX Refinements: - frontend-design skill compliance across all pages - Glassmorphism effects, modal interactions, scroll tap prevention - iPhone 12 Pro responsive layout (390x844) Flutter Development Preparation: - Installed flutter-expert skill with 6 reference docs - Added 5 Cursor Rules: official Flutter, clean architecture, UI performance, testing, Dart standards Assets: - 9 Capybara music MP3 files + lyrics TXT files - MiniMax API documentation Co-authored-by: Cursor <cursoragent@cursor.com>
2.0 KiB
2.0 KiB
Performance Optimization
Profiling Commands
# Run in profile mode
flutter run --profile
# Analyze performance
flutter analyze
# DevTools
flutter pub global activate devtools
flutter pub global run devtools
Common Optimizations
Const Widgets
// ❌ Rebuilds every time
Widget build(BuildContext context) {
return Container(
padding: EdgeInsets.all(16), // Creates new object
child: Text('Hello'),
);
}
// ✅ Const prevents rebuilds
Widget build(BuildContext context) {
return Container(
padding: const EdgeInsets.all(16),
child: const Text('Hello'),
);
}
Selective Provider Watching
// ❌ Rebuilds on any user change
final user = ref.watch(userProvider);
return Text(user.name);
// ✅ Only rebuilds when name changes
final name = ref.watch(userProvider.select((u) => u.name));
return Text(name);
RepaintBoundary
// Isolate expensive widgets
RepaintBoundary(
child: ComplexAnimatedWidget(),
)
Image Optimization
// Use cached_network_image
CachedNetworkImage(
imageUrl: url,
placeholder: (_, __) => const CircularProgressIndicator(),
errorWidget: (_, __, ___) => const Icon(Icons.error),
)
// Resize images
Image.network(
url,
cacheWidth: 200, // Resize in memory
cacheHeight: 200,
)
Compute for Heavy Operations
// ❌ Blocks UI thread
final result = heavyComputation(data);
// ✅ Runs in isolate
final result = await compute(heavyComputation, data);
Performance Checklist
| Check | Solution |
|---|---|
| Unnecessary rebuilds | Add const, use select() |
| Large lists | Use ListView.builder |
| Image loading | Use cached_network_image |
| Heavy computation | Use compute() |
| Jank in animations | Use RepaintBoundary |
| Memory leaks | Dispose controllers |
DevTools Metrics
- Frame rendering time: < 16ms for 60fps
- Widget rebuilds: Minimize unnecessary rebuilds
- Memory usage: Watch for leaks
- CPU profiler: Identify bottlenecks