In Go, you can write your system, such that the GC doesn't have to get so involved with your objects on the heap. Simply use arrays and slices and avoid using pointers otherwise. Slices contain pointers, but if they are pointing to structs in an array that themselves contain no pointers, then you will greatly minimize GC pressure. I suspect you can use the "unsafe" package in Go to do allocations outside of the GC heap, in which case, the GC will not bother traversing there. However, there is the question of whether you would want to do this, as you are giving up type safety and GC and Go has no other facilities like RAII.
Apparently, programmers at Twitter do tasks of the size you describe with Scala on the Hotspot JVM.
http://www.parleys.com/play/514892290364bc17fc56c34b/chapter...
