tqchen commented on issue #17097: [mxnet 2.0][item 10.1] MXNet Imperative Op Invocation Overhead URL: https://github.com/apache/incubator-mxnet/issues/17097#issuecomment-568046278 @sxjscience here are some quick thoughts (of course passing pyobject kind of "solves" the problem, so I am discussing the wrapping that can be done through the tvm ffi). - concatenate seems can be achieved through the python side wrapping ```concat-> concat_internal(*args)``` - return list value can be addressed by introducing a Tuple object to tvm runtime, we recently did that. The py_slice is the most tricky case, my guess is that it could be accelerated through a cython layer that translate the slice into flattened representation, of course it is not too ideal and pybind maybe better for this case if we only want to handle it through c++.
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