I downloaded a step file of a terminal block from a manufacturer. It just has 1 imported surface for the whole part. When I run Evaluate->Statistics, it has a rebuild time of 0.0. It's a fairly complicated part, and I don't know if I should beleive that number. If I run feature recognition, the rebuild time is .86s for this one part. There might be a few hundred of these terminal blocks in my assembly when it's done.
Basically, we are creating big assemblies and want to have an accurate way of evaluating the models that we have to see how much strain they are putting on our system.