Hi and welcome to the forum!
KarenI wrote: ↑
Wed Jul 15, 2020 9:22 pm
Is there a way to keep Freecad from eating memory when converting?
FreeCAD is not at all optimized for meshes and representing them in FreeCAD requires a lot of overhead. Yet the mesh bears less information. Think of a cylinder: for FreeCAD you have the base with a center and the radius, and the height. An STL would have a hole bunch of triangles to approximate the cylinder surface, yet it stays a tesselation.