Some adjustments in order to get a better performance.
Some adjustments in order to get a better performance.

Changed the number of threads, the amount of elements enqueued and
dequeued at once, and add some delays in the producer (dispatcher) side.

I'm also printing the amount of prime numbers found per second, but the
thing is not performing :-( ... at least not as much as I'd have liked.

darkturo/primo,darkturo/primo,darkturo/primo