On a question of just performance, how does Python 3 compare to Python 2.x?
I think ultimately it is too early to make that kind of comparison just yet. Wait until it is out of beta before benchmarking it. The interpreter will probably be polished enormously before the release but overall i think for most uses the performance would be comparable and if you are running a really speed conscious app is python really the right language to be using?
Performance: Python 3.x vs Python 2.x