code: def set_bulk_size(size):
      
      prev = ctypes.c_int()
      check_call(_LIB.MXEngineSetBulkSize(
          ctypes.c_int(size), ctypes.byref(prev)))
      return prev.value
docs: Set size limit on bulk execution.
  
      Bulk execution bundles many operators to run together.
      This can improve performance when running a lot of small
      operators sequentially.
  
      Parameters
      ----------
      size : int
          Maximum number of operators that can be bundled in a bulk.
  
      Returns
      -------
      int
          Previous bulk size.