I guess you could have one `map()` that uses `asyn...

# coroutines

[mp]

I guess you could have one map() that uses async {} with a particular dispatcher that's bound to a thread pool with a suitable number of threads (e.g. # of CPUs - 2 or something like that), and then another map() that `it.await()`s, but you might as well ahve just used parallel() at that point.