class_docstr: Helper abc which defines all methods a ParallelBackend must implement
class_docstr_tok: ["Helper","abc","which","defines","all","methods","a","ParallelBackend","must","implement"]
docstr: Determine the optimal batch size
code: def compute_batch_size(self):
      """Determine the optimal batch size"""
      return 1
  
imports: import gc
  import os
  import sys
  import warnings
  import threading
  from abc import ABCMeta, abstractmethod
  from .format_stack import format_exc
  from .my_exceptions import WorkerInterrupt, TransportableException
  from ._multiprocessing_helpers import mp
  from ._compat import with_metaclass
label_desc: Use image node_id 5 for calling the ParallelBackendBase obj's underlying member method code with example usage: obj.compute_batch_size() and returns: int