Package workerpool provides a workerpool. It also can expand and shrink dynamically. Jobs can be queued using the Queue() method which also accepts a timeout parameter for timing out queuing and if all workers are too busy. For expanding the queue, Expand() method can be used, which increases the number of workers. If a timeout is provided, these extra workers will stop, if there are not enough jobs to do. It is also possible to explicitly stop extra workers by providing a quit channel.