At the moment I'm using sphere 6,6, which is a low poly sphere. But anyway, the grid is hidden, so the performance loss will be to do with using it as an array. And the array is at least 13 times bigger than the size of the chosen spacetime scale. But at least I'm not putting in Time, which would make a single particle use up all of the computer. I could do a demo of time though, just to show what it looks like.
That whole object on the screen scrolls around OK though if anyone is interested in the performance of DBPro. There are just 20000 sphere 6,6. I think I can handle about 60000. Once hidden, it can go higher I think, on a normal computer, and using an array.