STD is built on goroutines whereas these performance networking libraries are built on a main reactor loop. Hence the need for refactoring, not just tweaking.

Something like http/v2 and net/v2. I know gnet had(has?) issues wit implementing tls because how the entire STD is designed to work. At the time, it was a great piece of software, but by now, it is slow and outdated. A lot of progress has been made since in networking, parsing, serialization, atomics and so on.