My experience with GitHub Codespaces is mostly limited to when I forgot my laptop and had to work from my iPad. It was a horrible experience, mostly because Codespaces didn’t support touch or Safari very well and I also couldn’t use IntelliJ which I’m more familiar with.

Can’t really say anything for performance, but I don’t think it’ll beat my laptop unless maven can magically take decent advantage of 32 cores (which I unfortunately know it can’t).