The highly single-thread usage with this game is basically appalling when I have a six-core/12 thread i7-8750H. I bet even with thermal/power limit throttling applied, that TPT will run faster on all 12 threads (and should be able to run off more) than on a single damn thread.
Please prioritise multi-threadding for the next update, this will boost performance by a significant margin.
BTW, I was using "water equalisation". Maybe GPU utilisation for the physics would work as well?