ReactJS - How to optimize performance when rendering large lists with dynamic filtering using useMemo?
I'm updating my dependencies and I keep running into I've been struggling with this for a few days now and could really use some help..... I've spent hours debugging this and I'm trying to implement I'm working on a React application where I'm rendering a large list of items (about 10,000 entries) that users can filter dynamically. I'm using `useMemo` to optimize the filtering process, but I'm still facing performance issues where the UI becomes unresponsive during user interactions. My filtering function is relatively simple, yet the re-renders seem to be causing noticeable lag. Here's a snippet of my code: ```javascript import React, { useMemo, useState } from 'react'; const ItemList = ({ items }) => { const [filter, setFilter] = useState(''); const filteredItems = useMemo(() => { return items.filter(item => item.name.includes(filter)); }, [filter, items]); return ( <div> <input type="text" value={filter} onChange={(e) => setFilter(e.target.value)} placeholder="Filter items" /> <ul> {filteredItems.map(item => ( <li key={item.id}>{item.name}</li> ))} </ul> </div> ); }; ``` I’ve tried a few things like memoizing the individual list items with `React.memo()` and using the `key` prop effectively, but the lag persists. I also considered pagination or virtualization libraries like `react-window`, but I'm not sure if they would integrate smoothly with my current design. When I type in the filter input, the lag can sometimes exceed 1000ms, making the experience frustrating. Is there a better way to handle this scenario without compromising functionality? Any suggestions for optimizing this would be greatly appreciated! How would you solve this? This issue appeared after updating to Javascript 3.11. Any pointers in the right direction? This issue appeared after updating to Javascript 3.9.