[staticassertion]

TensorFlow is written in C++ so I'd expect it to impact the deep learning result.

[vonnik]

Every serious lib was written in C/C++ under the hood long before TensorFlow came along.

[staticassertion]

True, at least to some extent. But I think TensorFlow treated C++ as a first class citizen and not as a tool to improve performance.

You wouldn't use sklearn as a C++ developer, for example. But you could totally use TensorFlow.