It's close in the sense that it's also Jabbascript SPA crap that needs a supercomputer just to (try and fail to) display a diff of a few thousands lines, you mean? We're using it at work and it sucks massively.
I'd rather have the open core one running on my own servers (i.e. GitLab), but performance is a few orders of magnitude away from acceptable for both Git**b.
I run GitLab and its CI on a Xeon server from 2010. It's fine. It runs exactly as fast as anything else on that machine. I've also run it on a tiny AWS instance. Also fine.
I don't like that the idle CPU load is high (for really inane reasons) but it performs perfectly well.