Raku has `await` but it doesn't need `async`.

    sub foo ( Int \n where 1..100 ) {
      #  ___ start is a prefix operator that creates a Promise
      # V
      start { sleep n.rand; (1..n).pick }
    }

    my $result = foo(10);

    say $result.status; # Planned

    say await $result; # 6 (after a delay)



    # this is nearly identical to foo above
    sub bar ( Int \n where 1..100 ) {
      Promise.in( n.rand ).then({ (1..n).pick })
    }

(Note that `start` does not need a block unless you are grouping more than one statement as I have above.)

There are combinators like `Promise.allof` and `Promise.anyof`.

You usually don't need to use `Promise.allof`, because you can use `await` on a list.

    my @promises = Promise.in(1.rand) xx 10;

    my @results = await @promises;

(Note that the left side of `xx` is _thunky_ so there are ten different Promises with ten different random wait times.)

---

You should see the `react`/`supply` and `whenever` feature.