I can't wait to hear Linus' reaction. He about blew a gasket when someone wanted to use C++ in the main git project. Then again, this is a wholly separate project so he might just shrug and move on, but I still think he might have some colorful comments.

I don't personally buy his claims that performance is so critical it needs to be written in C. I'd be interested in any speed comparisons the js-git authors might have made. It would surprise me if js-git was anywhere near as fast, but I can't imagine it's impossible to make it at least usable.