I only read about BeOS in exuberant PC World articles in the early '00s, but I got the impression it was really, really good–pre-emptive multi-tasking and all.

I only read about BeOS in exuberant PC World articles in the early '00s, but I got the impression it was really, really good–pre-emptive multi-tasking and all. Now this blog post says that Haiku has device servers. That sounds like the 'fast flyweight delegation' technique described here: https://blog.acolyer.org/2017/12/04/ffwd-delegation-is-much-faster-than-you-think/ https://blog.acolyer.org/2017/12/04/ffwd-delegation-is-much-... ... and also used by the Erlang VM.