How slow is ungodly slow to you? It's pretty slow on Firefox's code base but that repo is huge. For most things it's not lightning fast but definitely not ungodly slow.
Oh, yeah, gecko is not a fair comparison at all for any git utility. Even on my beefy linux box, m-c takes an age to load under magit. Even doing CLI-based interactive rebases takes a while. Yay 300k+ commits.
