Memory issue in converting large Gmsh meshes at linear order
@ssherw reported that a large (14M element) mesh ran out of memory whilst running the MakeOrder
routine. This is because, presently, all edge, face and volume geometries are constructed to facilitate the high-order mesh conversion which is undoubtedly using quite a lot of memory, even at order 1. Earlier versions of the code run fine with these large test cases. Potentially this could be fixed through avoiding this call if MakeOrder
is called with order 1.