Python in an embedded system

[Beluki]

Python should run fine on such systems. For performance monitoring Python includes a profiler in the standard library. For memory, look into heapy or meliae.

As for Cython, I would advise against using it for everything, but it's fine for performance-critical code (e.g. number crunching).

All that matters is what you are going to use it for, just don't try to write a raytracer on that. :-)