> I like PyPy as an example: on the surface, implementing a Python runtime in Python and expecting performance gains seems crazy. Not if it includes a JIT comp

> I like PyPy as an example: on the surface, implementing a Python runtime in Python and expecting performance gains seems crazy. Not if it includes a JIT compiler, as PyPy does. I don't know much about PyPy, but if most of the time is spent in JITted machine code, the fact that it's written in Python may not affect performance much.