In most cases likely not, but there are some people using Go for CPU-bound stuff. There was a guy at gophercon yesterday who did a pretty cool demo of a raytrac

In most cases likely not, but there are some people using Go for CPU-bound stuff. There was a guy at gophercon yesterday who did a pretty cool demo of a raytracer he wrote in Go. He talked about the 15x performance improvement it had over using Javascript. I would definitely not choose to build a raytracer in Javascript, and probably not even in Go either. C, C++, Rust, are probably the most common choices made by people who are building something that is seriously CPU-bound.