Poorly. Using a more efficient engine such as Bevy (Rust) might help, but best is to just make a website so you’re relying on the performance of the user’s computer – something you can also do with Bevy, although using JS would probably be better.
Honestly, it is not good. I have tries a simple console game and it lags and in the past (previous deleted account) I did some basic graphics … more lag.
I am now trying to do it in C++20, but i do expect the same result.
You mean you are working locally. That wil always work.
As for Replit, I guess js games are the only thing as they rely a lot on the client instead of Replit.