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Re:The Piston image library is now pure Rust by tupshin on Sunday January 08, 2017 @09:56AM (#13349884)
I believe the idea is that tokio, because of its zero-cost abstractions will be able to be efficiently be the foundation of those styles.

Check out https://github.com/dpc/tokio-fiber/ for co-routines being re-envisioned on tokio, and https://github.com/rust-lang/rfcs/issues/613 acknowledges that the actor story is still a work-in-progress.

I have seen no indication that either coroutines or futures will be less ergonomic or performant due to being built on top of tokio's futures.

Re:The Piston image library is now pure Rust by bsaul on Sunday January 08, 2017 @03:01PM (#13351639)
This whole discussion regarding concurrency/parallelism stacks made me think that there's probably a good blog post to write:

Start with low-level OS system calls and show what pieces one needs to write to reach higher level abstractions like futures, coroutines , async / await, nodejs style event loop, or full blown actors.

That would also make for a nice roadmap to whoever would like to build OTP or Akka style framework in Rust.