👀 Views: 0 💬 Answers: 1 📅 Created: 2025-08-24

react sorting performance javascript

I'm trying to implement I'm converting an old project and I've looked through the documentation and I'm still confused about I've searched everywhere and can't find a clear answer. I'm relatively new to this, so bear with me... 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 that displays a list of user profiles fetched from an API. The user objects contain properties such as `name`, `age`, and `registrationDate`. I want to implement a custom sorting functionality that allows users to sort by these fields, but I've run into performance issues when the list grows larger. My current implementation uses a simple sort function, but it seems to lag significantly for larger arrays. Here's the code that I'm using to handle sorting: ```javascript const [users, setUsers] = useState([]); const [sortField, setSortField] = useState('name'); // default sort by name const [sortOrder, setSortOrder] = useState('asc'); // default ascending order const handleSort = () => { const sortedUsers = [...users].sort((a, b) => { if (sortField === 'name') { return sortOrder === 'asc' ? a.name.localeCompare(b.name) : b.name.localeCompare(a.name); } else if (sortField === 'age') { return sortOrder === 'asc' ? a.age - b.age : b.age - a.age; } else if (sortField === 'registrationDate') { return sortOrder === 'asc' ? new Date(a.registrationDate) - new Date(b.registrationDate) : new Date(b.registrationDate) - new Date(a.registrationDate); } }); setUsers(sortedUsers); }; ``` I've tied this sorting function to a button click, which calls `handleSort`, and it works fine for small datasets. However, as the number of users increases (currently around 10,000), the UI becomes unresponsive for several seconds while the sorting is performed. I’ve also tried using `React.memo` on the list component, but it doesn’t seem to improve performance. Is there a more efficient way to handle sorting, perhaps by implementing a more performant sorting algorithm or by optimizing how state updates? Also, I noticed that the sorting does not maintain the focus on the currently visible portion of the list when the sorting function is called, which is a bit disorienting for the user. Any suggestions would be greatly appreciated! How would you solve this? For context: I'm using Javascript on Ubuntu. Any help would be greatly appreciated! This is part of a larger CLI tool I'm building. How would you solve this? My development environment is Windows. What's the best practice here? I'm coming from a different tech stack and learning Javascript. Thanks, I really appreciate it! Am I missing something obvious?