"Shed Skin is an experimental Python-to-C++ compiler. It accepts pure Python programs, and generates optimized C++ code. This means that, in combination with a C++ compiler, it allows for translation of Python programs into highly efficient machine language. For a set of 16 non-trivial test programs, measurements show a typical speedup of 2-40 over Psyco, about 12 on average, and 2-220 over CPython, about 45 on average. Shed Skin also outputs annotated source code."