I was running great at near 100fps and noticed it getting slow all of a sudden. Something happened that caused the fort to drop to 14fps. I only have 29 dwarves and not a lot built or going on at all. Running 40.02. Using the df starter pack on windows. i have an i5 3570k at 3.4ghz with 8gb ram. If I look at task manager, df is taking 25% cpu. If iI look at the individual cores, none of them are peaked, they all are about 25%. My total cpu usage is about 32% across all processes. total physical memory used is 4.42gb with df taking 518mb. windows 7