[lenkite]

Use vertx if you want lean REST micro-services. I so wish vertx was part of the standard library.

The main advantages that Go has over Java is that the standard library is brilliant - thus obviating the need for folks to create monstrous frameworks (and losing performance) and that Go has better memory utilization because of value types (structs) and because it is AOT compiled. Unfortunately Java JIT as designed by the JVM devs takes a lot of memory.

In raw performance, I would still give the edge to Java over Golang though.