Pause API is needed in some scenario

[lilien1010]

in our case, we need a pool.Pause() to pause all jobs, and use pool.Resume() to restart the jobs.

[panjf2000]

What did you mean by pausing and resuming jobs? I don't think that ants should interfere with the internal logic, or you were talking about ants intercepting new tasks (by pool.Pause()) and undoing it (by pool.Resume())?

[timo-klarshift]

You can simply implement Pause() and Resume() in some wrapping code. Just keep track of the state (running & paused) and if paused stop submitting new tasks to the pool (or stop reading tasks from a channel). And after resuming continue to submit tasks to the pool...
IMO this is userland logic and there is no need for this library to handle such things.