ElaineBao commented on issue #17906: Optimize AddTakeGrad Tensor Sum
URL: https://github.com/apache/incubator-mxnet/pull/17906#issuecomment-604169748
 
 
   > Is tensor-level summation slow as the compiler fails to optimize the 
mshadow implementation? Or what is the reason?
   
   Not quite sure about the reason, but I think it may be related to temporary 
memory allocation

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