Hi CrazyColibri,
welcome to the forums! Please write in English, it's one of the forum rules we have, since the ShiVa user base comes form all over the world and it's easier for everyone if we keep it one language.
Slowdowns usually come from problems with your code. No 2 computers are exactly alike, and the range of framerates you have to account for because of hard- and software differences is nearly endless. That's why you have to code in a framerate independent way using a concept called deltatime:
http://www.shiva-engine.com/legacy/wiki ... r_movementDynamics are framerate independent by design, but handlers and standard TRS code is not. If you mix these types of code carelessly, you will end up with unexpected results if the target machine runs much slower or faster than the one you are developing on.