A C++ Real-Time Broadcast App with Silicon and Websockets
siliconframework.org
siliconframework.org
EDIT: didn't know about IOD, looks nice.
In short, this framework is targeted to experienced C++ users with a big focus on performance.
In terms of language, the big difference to me between Go and C++ is templates. Go does not include them, which makes it a bit more limited but on the other hand much simpler to understand for beginners and faster to compile.