code: def AddPerformanceOptions(self, argument_group):
      
      argument_group.add_argument(
          '--buffer_size', '--buffer-size', '--bs', dest='buffer_size',
          action='store', default=0, help=(
              'The buffer size for the output (defaults to 196MiB).'))
  
      argument_group.add_argument(
          '--queue_size', '--queue-size', dest='queue_size', action='store',
          default=0, help=(
              'The maximum number of queued items per worker '
              '(defaults to {0:d})').format(self._DEFAULT_QUEUE_SIZE))
docs: Adds the performance options to the argument group.
  
      Args:
        argument_group (argparse._ArgumentGroup): argparse argument group.