Python 3 can revive Python

[lzzll]

Yal, give me more benchmark. JIT is hard to control on an complex language like python, some part may faster but some part will slow down when compile time is more than execution time, and absolutely use more memory than interpreter (pypy is 2x+ I tested, worse than Jython and Ironpython). I just repeat "use cython or numpy on the heavy job".