There is definitely an intention to write some sort of JIT-to-xtensor compiler at some point. I've personally worked on a "simple" (1000 lines of Python) NumPy-

There is definitely an intention to write some sort of JIT-to-xtensor compiler at some point. I've personally worked on a "simple" (1000 lines of Python) NumPy-to-Armadillo (C++) JIT compiler before, and we're in close contact with the author of Pythran, which also compiles to C++. So hopefully at some point you'll be able to go from NumPy to all the languages, and NumPy becomes a high-level array operation description language with multiple backends.