If Go does have some kind of "__builtin_expect" equivalent, I can't find it. I'd say it probably doesn't exist. Even if it _did_ exist, the Go compiler authors

If Go does have some kind of "__builtin_expect" equivalent, I can't find it. I'd say it probably doesn't exist. Even if it _did_ exist, the Go compiler authors would reserve it for internal use only, like they do with most other Go compiler directives.