Concurrency

OCaml:

• async module:

  the idea of Deferred.t and maintain a scheduler Deferred.bind: 'a Deferred.t -> ('a -> 'b Deferred.t) -> 'b Deferred.t;>>=Return:'a -> 'a Deferred.tDeferred.map:'a Deferred.t-> ('a -> 'b) -> 'b Deferred.t; >>|; "monad" Utop will wait for deferred to be determined