Yeah I've seen this before though it doesn't really allow you to share arbitrary data as it relies on Web Workers (if you share data with a worker it will disap

Yeah I've seen this before though it doesn't really allow you to share arbitrary data as it relies on Web Workers (if you share data with a worker it will disappear from the sending process). I'd also be concerned about the performance of the implementation, core.async adopts C#'s approach which is pretty light weight.