I once hit an unplayable slowdown (on Windows, though), where the devs told me I somehow managed to break the physics (NaNs everywhere). May have been a similar

I once hit an unplayable slowdown (on Windows, though), where the devs told me I somehow managed to break the physics (NaNs everywhere). May have been a similar issue, as otherwise minor slowdowns are usually accompanied by excessive things happening (and unless you have an auto-cast Nuke wand, they're infrequent).