Or Dart. It's a lot closer to node and JS than Go (it uses asynchronous IO), and can more easily be used across both the server and client (Go's compilation-to-Javascript support is less developed). It's also surprisingly fast for a dynamic language, and has the generics Go lacks.
Should also mention that Dart is faster than Node - it benefits from Google's development of V8, and the language design was built for optimization while taking a lot of the good parts from JS.
V8 Turbofan using asm.js AOT that is in beta right now otherwise.