code: def bulk(size):
      """Bulk execution bundles many operators to run together.
      This can improve performance when running a lot of small
      operators sequentially.
  
      Returns a scope for managing bulk size::
  
          with mx.engine.bulk(10):
              x = mx.nd.zeros((1,))
              for i in range(100):
                  x += 1
      """
      return _BulkScope(size)
  
file_path: mxnet/python/mxnet/engine.py
imports: import ctypes
  from .base import _LIB, check_call
label_desc: Use image node_id 2 for calling a global function with example usage: bulk(size) and returns: _BulkScope