Is Flutter Web Production Ready? Mature Compared to Angular/Vue/React?

Try this Web version of Fluffychat , Matrix client written in Flutter.

https://fluffychat.im/web

I find it sluggish , performance is not so good and it takes much time for first-render.

How would compare maturity with more popular frameworks that have been around for more than twice as long?

Genuinely curious as to what you meant by that question.

Anything is production ready when you decide to put it on production.