React 18: Difficulty with Memoizing a Component with Dynamic Props using useMemo and Prop Changes
I'm optimizing some code but I've been struggling with this for a few days now and could really use some help... I'm currently working on a React application where I need to optimize rendering for a component that takes dynamic props. The component receives a large dataset and filters it based on user input. I've set up the component to use `useMemo` to memoize the filtered results, but I’m encountering performance issues as the dataset updates frequently. Whenever the dataset changes, the entire component seems to re-render instead of just updating the relevant parts. Here’s a simplified version of my component: ```javascript import React, { useState, useMemo } from 'react'; const DataList = ({ data, filter }) => { const filteredData = useMemo(() => { return data.filter(item => item.includes(filter)); }, [data, filter]); return ( <ul> {filteredData.map(item => <li key={item}>{item}</li>)} </ul> ); }; const ParentComponent = () => { const [filter, setFilter] = useState(''); const [data, setData] = useState(['apple', 'banana', 'cherry']); return ( <div> <input type="text" value={filter} onChange={e => setFilter(e.target.value)} /> <DataList data={data} filter={filter} /> </div> ); }; ``` When I type in the input field, the DataList component updates, but it feels sluggish, especially with larger datasets (around 500 items). I also tried using `React.memo` on the DataList component to prevent unnecessary re-renders, but the performance improvement was minimal. I’m seeing the following warning in my console: ``` Warning: An update to DataList inside a test was not wrapped in act(...). ``` Could this warning be influencing the rendering performance? I’d appreciate any insights on how to effectively memoize components that rely on dynamic props and any best practices I might be missing. Thanks in advance! This is part of a larger service I'm building. I'm open to any suggestions. I'm working with Javascript in a Docker container on Linux. What am I doing wrong?