Speed - advice

Hi Brian,

this question is too complex to be answered generally - the answer depends on the problems you are interested in:
physical models, particle sizes / size ratios, load balancing issues, neighbor list build ...
My advice is to get yourself a basic knowledge of how DEM algorithms works. If you have a general idea, the manual will guive advices how to do things properly - alternatively you can also request our consulting if you have specific requests,

Best,
Christoph