Flutter Performance Improvement
Flutter has implemented several performance improvements to enhance the efficiency of app development and runtime execution. Key optimizations include the introduction of the Dart Dev Compiler, which generates efficient JavaScript code for web apps, and enhancements in the Flutter rendering engine, which utilizes a Skia graphics library to provide smooth animations and transitions. The framework also benefits from widget rebuilding optimizations, enabling selective updates to the UI rather than a complete redraw. Additionally, features like deferred loading allow apps to load only the necessary resources, reducing initial loading times. Together, these advancements help deliver high-performance applications with a smooth user experience across different platforms.
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1 - Widget Rebuilds: Learn how to minimize widget rebuilds using `const` constructors, which allows Flutter to reuse instances and reduces the need for redrawing the UI.
2) Tree Shaking: Understand how Flutter removes unused code during the build process, leading to smaller app sizes and improved startup times.
3) Lazy Loading: Discover techniques such as `ListView.builder` and `GridView.builder`, which only build items as they scroll into view, enhancing performance for large datasets.
4) Effective Asset Management: Utilize optimal image and asset formats; for example, use SVGs or webP images to improve loading times and reduce memory usage.
5) Isolate: Learn about Dart’s isolates for parallel processing, allowing you to offload heavy computations from the UI thread to maintain smooth animations and responsiveness.
6) RenderObject Optimization: Explore custom `RenderObject` subclasses to optimize the painting and layout process for complex widgets that require specialized rendering strategies.
7) Efficient State Management: Get familiar with state management solutions (like Provider, Riverpod, or BLoC) that help in managing app state effectively without unnecessary rebuilds.
8) Profile and Analyze: Gain experience in using Flutter’s DevTools to profile app performance and identify bottlenecks or areas where improvements can be made.
9) Avoiding Overdraw: Understand how to minimize overdraw by optimizing your widget tree and ensuring only the necessary layers are painted to the screen.
10) Using the `flutter run profile` Command: Learn how to run your app in profile mode to see real time performance metrics and make informed decisions based on profiling data.
11) Custom Paint: Get insights into how `CustomPaint` can be used for drawing complex shapes efficiently instead of using multiple layers of widgets.
12) Image Caching: Use caching techniques for images via packages like `cached_network_image` to avoid redownloading images and to improve scrolling performance.
13) Scaffold and Material Components: Learn to leverage Flutter’s built in widgets and components, which are optimized for performance, rather than creating custom widgets from scratch.
14) Reduce the Size of the Widget Tree: Discover techniques to simplify the widget tree structure, leading to more efficient layout calculations and rendering.
15) Asynchronous Programming: Master the use of `async` and `await` to handle heavy tasks without blocking the UI thread, ensuring a responsive user interface.
16) Use of RenderBox: Explore how to utilize `RenderBox` directly for more complex layouts while still achieving high performance rendering.
17) Minimize the Use of Global Keys: Understand the performance costs associated with `GlobalKey` and when it is appropriate to use them sparingly.
18) Background Services: Learn how to offload background tasks using plugins, allowing your main thread to remain responsive while data processing takes place.
This curriculum covers a comprehensive range of Flutter performance improvement techniques measured to equip students with the skills and knowledge needed to develop fast and efficient mobile applications.
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