Improve performance of Tensor object creation. #1383
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For some reason libtorch is very slow when constructing Tensor objects by assigning values one by one. On my box, it could take 200ms to handle a batch of 128 connect-four states (just creating Tensors, not doing inference) on CUDA and 30ms on CPU. With this change, it's <100us.
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For some reason libtorch is very slow when constructing Tensor objects by assigning values one by one. On my box, it could take 200ms to handle a batch of 128 connect-four states (just creating Tensors, not doing inference) on CUDA and 30ms on CPU. With this change, it's <100us.