go func() {
		defer wg.Done()
		for {
			select {
			case <-stopDraining:
				return
			default:
				if cap(c.outQueue)-len(c.outQueue) > 100 {
					// Queue is not full, wait a bit.
					time.Sleep(1 * time.Millisecond)
					continue
				}
				select {
				case v := <-c.outQueue:
					PutByteBuffer(v)
				case <-stopDraining:
					return
				}
			}
		}
	}()