Press F11 and see if number of faces or draw calls is increasing over time. It might help find a sw bug
I mean, do you see anything weird? Draw calls are like < 140 with the display off. There's not much going on the script. You could try messing with the lamp timer interval but I don't think that will help. Aside from the script, you can set nearly all non-moving objects to static rendered with no visual changes because this table uses no transmit lights.
It's just a memory intensive table (especially for the lights, it's flashers images all the way down). Optimization was a priority because the beta Space Station was the laggiest table released at the time, I got this one up to 446FPS which is double the FPS of most tables. So responses like this were kind of a shock. That's the importance of feedback though, I developed and tested everything on a GTX970 and wasn't thinking of older machines with less video ram.
In the future I'll probably release two flavors of tables, one with selectively smaller light images that hopefully will look very similar, but with less memory usage.