VTK - performance: as order for multiple fields is important, I need to test thorough and make sure nothing is reversed by using the reversed loop 
VTK - performance: as order for multiple fields is important, I need to test thorough and make sure nothing is reversed by using the reversed loop 

vtkio/vtk,vtkio/vtk,vtkio/vtk,vtkio/vtk,vtkio/vtk,vtkio/vtk,vtkio/vtk,vtkio/vtk