"100% CPU usage" is not a good metric for performance. tyFlow uses a dynamic thread scheduler that assigns the optimal number of threads to a task, so you'll see overall usage go up or down depending on what it's calculating. You won't see all 64 used until you start working with many millions of particles.
If you can make a flow with 10 million particles and usage does not go up to 100% during long calculations, let me know.
If you can make a flow with 10 million particles and usage does not go up to 100% during long calculations, let me know.