PyTorch Frontend: C++11 vs Python

PyTorch has just released the C++11 front-end, and I am in a struggle answering these questions:

• Does it worth shifting from the Python front-end to the C++'s (concerning performance)?
• Is the development time going to be much more using the C++ front-end than the Python's?
• When should I use it?
• What is the trade-off?