I’d imagine the idea was to keep the design flexib...

# coroutines

[kingsley]

I’d imagine the idea was to keep the design flexible.
1. Job is lightweight and it’s more like the representation of the state of the coroutine. Deferred itself is actually a Job, but with more capability. It holds the result of the execution
2. The behavior of async and launch is slightly different in that launch will propagate any exceptions thrown, whereas async saves that result/exception in the Deferred. This also makes sense given the description in (1) above.

This is only my understanding of it. Perhaps someone will put up a more detailed description of the design decisions.