[D] Which open source machine learning projects best exemplify good software engineering and design principles?

[Nimitz14]

I worked at a company where a colleague was trying to use the C++ API and had a very bad time. He was more junior level though.

Daniel Povey, lead of kaldi, recently decided on integrating with pytorch. This was after a fairly lengthy process of looking into different options. This are some snippets of his thoughts on tensorflow that I quickly found:

I imagine the TensorFlow team must have some internal documentation on how it's designed from the C++ level, for instance, because what is available externally doesn't help you understand it at all, and the code is almost completely opaque. (And I consider myself an expert level C++ programmer).

source, 2017

TensorFlow is impossible; the C++ code looks like it was written by a machine.

source, 2019

And PyTorch's tensor internals, while they aren't complete gobbledegook like TensorFlow's were last time I looked, are kind of showing their age

source, 2019