[JAVA3D] cylinder, box, cone share there geometry??

[Silvio Simone]

Hello, I have a stupid question. In the Utils API documentation they write, that Box, Cylinder Cones... share there geometry because they extends Primitive. So if I have a scene with 1000 same Spheres. It is useless to implement they as SharedGroups and Links because java3d does something similar intern?? I spend they same amount of memory as if I create 1000 Spherese with: new Sphere()??