It would be weird if that was not the case, as Go and all its bells and whistles are open source. I found this after a quick search (clicking around will send you to the source code): https://godoc.org/golang.org/x/tools/cmd/compilebench

edit: Ooh, that's nice, I did not know about that, thanks for sharing (especially useful as I'm transitioning to Rust after 10yrs of Go).