Thanx for your response Silverforce,
I have always kept in mind to not use effect, not to many sprites on screen( preferably not more then 20) I also read this tutorial performance-tips-for-mobile-games.
However when I use Pixelround off and sampling to point. My "gamecharacter" keeps shaking and everything gets more blurry and there is no increase in fps. Also webgl on or off no difference. As far as I can see there are no loops.
If you have suggestion in combination with Ludei plz let me know.
* I do find it weird that my old galaxy ace my game runs very slow, but still start. and on my wife Huawei g510 it won't even start.