Dug into this a bit more did a quick writeup here: http://www.skitoy.com/p/python-vs-ruby-performance/172 http://www.skitoy.com/p/python-vs-ruby-performance/17

Dug into this a bit more did a quick writeup here: http://www.skitoy.com/p/python-vs-ruby-performance/172 http://www.skitoy.com/p/python-vs-ruby-performance/172 Bottom line is well over 70% of time is going to rand() and 25% to list overhead, threading is drowned out by that noise.