new Schedulers.WorkConserving()
schedulers/workconserving.js, line 13
Pick a worker, remove it from the queue, send it work. When the worker is complete (either by callback or by ready signal) then put the worker back on the front of the queue. Attempts to always keep workers busy, favoring "warmed up" workers over idle ones.
NOTE: Keeps track if workers are busy, if they are will queue up work until a worker becomes available.