':return: The number of HTTP requests per minute performed since the
start of the scan.'

def get_rpm(self):

    if (self._start_time_epoch is None):
        raise RuntimeError('Can    NOT    call    get_run_time    before    start().')
    now = time.time()
    diff = (now - self._start_time_epoch)
    run_time = (diff / 60.0)
    return int((consecutive_number_generator.get() / run_time))
