As usual language and implementations aren't the same thing.
While Ruby community has pursuded many implementations in regards to JIT, the reference implementation even has two currently, on the Python side outside PyPy, nothing else has actually got any community support.
Only now thanks to the pressure of Python being the "2nd coming of Lisp for AI", but without its native code generation, there is some real pressure that actually writing C,C++,Fortran and calling it "Python" isn't that practical and a JIT on CPython would be welcomed.
On the other hand, those native libraries can be equally called from Ruby.
While Ruby community has pursuded many implementations in regards to JIT, the reference implementation even has two currently, on the Python side outside PyPy, nothing else has actually got any community support.
Only now thanks to the pressure of Python being the "2nd coming of Lisp for AI", but without its native code generation, there is some real pressure that actually writing C,C++,Fortran and calling it "Python" isn't that practical and a JIT on CPython would be welcomed.
On the other hand, those native libraries can be equally called from Ruby.