It's great to measure performance so you have an idea of areas you need to improve for your users to have a superb experience. There are some great tools you can use to do this as well. It's even better to make the users *tell* you what their experience is so your numbers are more real!

What's better than showing your user a loading spinner when they submit a form? Showing them the complete UI as if it happened instantly. That's Optimistic UI and Remix makes it simple.