React 18: Handling multiple asynchronous states causing excessive re-renders
I'm a bit lost with I'm confused about I'm working with a question with excessive re-renders in my React 18 application that uses multiple asynchronous states. I have a component that fetches user data and their posts concurrently, using two separate `useEffect` hooks. The scenario arises when the fetched data updates both states and causes the component to re-render more than necessary, which affects performance. For example, here’s a simplified version of my component: ```javascript import React, { useEffect, useState } from 'react'; const UserProfile = ({ userId }) => { const [userData, setUserData] = useState(null); const [posts, setPosts] = useState([]); useEffect(() => { const fetchUserData = async () => { const response = await fetch(`https://jsonplaceholder.typicode.com/users/${userId}`); const data = await response.json(); setUserData(data); }; fetchUserData(); }, [userId]); useEffect(() => { const fetchPosts = async () => { const response = await fetch(`https://jsonplaceholder.typicode.com/posts?userId=${userId}`); const data = await response.json(); setPosts(data); }; fetchPosts(); }, [userId]); return ( <div> {userData && <h1>{userData.name}</h1>} <ul> {posts.map(post => <li key={post.id}>{post.title}</li>)} </ul> </div> ); }; ``` While this works, I noticed that when both `userData` and `posts` are fetched and updated, it triggers multiple renders. I tried using a single `useEffect` to fetch both data in parallel, but it seems to complicate handling the states. Is there a more efficient way to manage these asynchronous calls without causing excessive re-renders? I also considered using `React.memo` on the list of posts to prevent unnecessary renders, but I'm uncertain if that's the best approach. Any insights or suggestions would be greatly appreciated! I'm developing on Debian with Javascript. Thanks in advance! This is part of a larger service I'm building. What's the correct way to implement this?