So how much is written in Javascript? Won't that performance pale in comparison to, say, Sublime which is written in C++? Or are just the plugins/extensions wr

So how much is written in Javascript? Won't that performance pale in comparison to, say, Sublime which is written in C++? Or are just the plugins/extensions written in Javascript while the core editor is in C or C++? Obligatory: People who got a beta invite, anyone feeling generous and want to give me one? (As I understand it, when you're invited you get a few to hand out, too.)