Jeez this is amazing. Just end to end, rock solid engineering. I came to chime in that this basically hits all the same design beats as go with it's standard library (relatively low foot print, compiled binary, async user-space threading, etc.) But that sells this work short.
I agree with the caveat I didn't read anything similar to go's work stealing thread scheduling, useful for tasks with synchonized IO for example.
What appeals to me is the Lua integration. I'd love for a Lua application server to become widely available. The http servers out there now don't really fit the bill for (Xavante, Luvit for example).
FYI "what wrong with X?" is not the same conversation as "Are you familiar with X? It has these great features ...". Great that you want to promotoe you're favorite tech, but there are more effective ways to do it.
This is amazing work!