I'm a hobbyist in this space. I have never used Seastar either, But I'm trying to design an "evented assembly" for efficiency in a thread-per-core architecture.

I'm a hobbyist in this space. I have never used Seastar either, But I'm trying to design an "evented assembly" for efficiency in a thread-per-core architecture. I really want the next generation NodeJS equivalent to take advantage of all these learnings and learnings from Erlang. I think nodejs showed how awesome event loops and async can be and simple. The TFA (The Friendly Article) makes it clear there are sharp edges with coroutines and lambdas in C++: - something stored in a temporary between a yield barrier will be destroyed by the time the coroutine is resumed - you have to make sure you store things inside the coroutine promise object - lambda capturing rule complexity associated with copying and moving semantics I am just learning but I've written a multithreaded barrier in C and Java that is mutex free. In 6×2 thread pairs it can communicate between threads in 42 nanoseconds. I have the beginnings of a JIT compiler. But there's so much work to do. My barrier resembles a "phaser" pattern in a loop and bulk synchronous parallel.