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at the moment I'm working at a little spelling game for which I use fiducials for letters (reactivision), processing for the logic, and arduino for the buttons and stuff I'm using to control the game. I know, this is all done really laboriously BUT it has to be like it is. (I know that this problem comes from working with processing, reactivision and arduino at the same time...)
So the big problem is the performance. I'm also using some GUI elements of ControlP5 and everything, every single button, every println() laggs as f****. I've already changed the camera.xml of reacTVision to the lowest quality. Nothing changed.