英文:
Performance optimization techniques for React Native apps?
问题
我一直在开发一个React Native应用程序，我正在寻找一些优化其性能的技巧和方法。虽然这个应用程序运行良好，但我注意到在高负荷使用或低端设备上偶尔会出现卡顿和卡顿的情况。
我会感激任何改进React Native应用程序性能的建议或最佳实践。是否有任何特定的技巧、库或工具可以帮助优化性能？关于减少渲染时间、优化内存使用或提高整体响应性的任何见解都将非常有价值。
我已经在使用代码拆分、懒加载和记忆化等技术，但我很愿意听到您在经验中证明有效的任何其他策略。
提前感谢您的建议！
英文:
I've been working on a React Native app and I'm looking for some tips and techniques to optimize its performance. While the app works fine, I've noticed some sluggishness and occasional lags during heavy usage or on lower-end devices.
I would appreciate any suggestions or best practices for improving the performance of React Native apps. Are there any specific techniques, libraries, or tools that can help with performance optimization? Any insights into reducing rendering times, optimizing memory usage, or improving overall responsiveness would be highly valuable.
I'm already using techniques like code splitting, lazy loading, and memoization, but I'd love to hear about any other strategies that have proven effective in your experience.
Thank you in advance for your suggestions!
答案1
得分: 1
以下是您要翻译的内容：
1- 首先避免使用内联函数，例如，我曾经像这样使用Native Stack Navigator：
<Stack.Screen
name="AVRoot"
component={props => <AVRoot {...props} />}
/>
将其更改为以下方式可以提高我的应用性能：
<Stack.Screen name="AVRoot">
{props => <AVRoot {...props} />}
</Stack.Screen>
2- 第二，尽量使用React.memo用于函数组件或React.PureComponent用于类组件。
3- 第三，使用react-native-fast-image包来渲染图像。它会缓存图像数据，以便更好地加载它们。
4- 在函数组件中使用钩子（hooks）会导致更清晰和更快的移动应用。我相信即使从类组件迁移到函数组件也对我的应用性能产生了影响。
5- 减少使用状态（states），而是尽量使用引用如果可能。
const [isOpen, setIsopen] = useState<boolean>(false);
const func = useCallback(() => {
if(isOpen.current)
console.log("sth")
else setIsopen(false);
}, [isOpen])
改为：
const isOpen = useRef<boolean>(false);
const func = useCallback(() => {
if(isOpen.current)
console.log("sth")
else isOpen.current = false;
}, [isOpen.current])
6- 使用Flatlist而不是在ScrollView内部呈现数据列表。
英文:
These are some tips that I used for my own app:
1- First avoid using inline functions, for example, I used to use Native Stack Navigator like this
<Stack.Screen
name="AVRoot"
component={props => <AVRoot {...props} />}
/>
changing it to this improved my app performance
<Stack.Screen name="AVRoot">
{props => <AVRoot {...props} />}
</Stack.Screen>
2- Second use React.memo for functional or React.PureComponent for class components as much as you can.
3- Third use react-native-fast-image package for rendering your images. it will cache the image data so you can load them better.
4- Using hooks in functional components results in cleaner and faster mobile app. I believe even migrating from class component to functional had effects on my app performance.
5- reduce using states, and instead use references if possible.
const [isOpen, setIsopen] = useState<boolean>(false);
const func = useCallback(() => {
if(isOpen.current)
console.log("sth")
else setIsopen(false);
}, [isOpen])
instead:
const isOpen = useRef<boolean>(false);
const func = useCallback(() => {
if(isOpen.current)
console.log("sth")
else isOpen.current = false;
}, [isOpen.current])
6- Use Flatlist instead of rendering the list of data inside a ScrollView
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