Pypy is written in RPython, a subset of the python language. When it's 'compiled', the pypy RPython code runs in cpython or pypy, to re-compile the pypy source into C code, to generate a binary. Lots of tuning and such occurs at the same time, so the JIT runs well on the target machine. This is why it takes a long while, and lots of memory.
Comments
http://stackoverflow.com/questions/8452396/does-pypy-transla...
Pypy is written in RPython, a subset of the python language. When it's 'compiled', the pypy RPython code runs in cpython or pypy, to re-compile the pypy source into C code, to generate a binary. Lots of tuning and such occurs at the same time, so the JIT runs well on the target machine. This is why it takes a long while, and lots of memory.
The build also prints a fractal while compiling. http://pypy.readthedocs.org/en/latest/faq.html#why-does-pypy...