[VladRussian2]

whenever i hear "lightweight threads" my PTSD from experience with Java "green threads" comes back. Of course, my rational mind understands that many years have passed and things may in other runtimes be implemented differently and there are many benefits vs. native, yet ...

[pron]

This has little, if any, to do with that. These lightweight threads are implemented pretty much exactly as they're implemented in Erlang or Go.