Python 2.5 to 2.6

My application runs at 60fps in Blender 2,49 python 2.5, but in python 2.6 is around 10fps …

My PC is:
OS: Ubuntu 9.04 -> installed python 2.5 and 2.6
OS: Vista Business -> installed python 2.5 and 2.6
GeForce 8400 GS
1GB Ram

Note # 1: both the same thing happens now convert python code (text-> text-plugins> Convert BGE 249) Anybody know what can be!

Note # 2: the scripts work normally but the framerate to slow!