wkcn edited a comment on issue #13199: Namescope is None when hybridize in 
multi-threading environment. AttributeError: 'NoneType' object has no attribute 
'__exit__'
URL: 
https://github.com/apache/incubator-mxnet/issues/13199#issuecomment-470043007
 
 
   @kohillyang 
   
   In my opinion, supporting multi-threading in Python will drop the 
performance, because we need to add locks to keep thread-safety.
   
   I think it's better to use multi-process in Python, which has GIL and create 
a fake multi-threading. We could pass NDArray object through Pipe, e.g. [Gluon 
DataLoader](https://github.com/apache/incubator-mxnet/blob/master/python/mxnet/gluon/data/dataloader.py#L98)
   
   Could you please provide some projects which use multi-threading to optimize 
a network? We may support multi-threading in Python if it is necessary. Thank 
you!
   
   Similar PR: https://github.com/apache/incubator-mxnet/pull/10833/

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