This was a very comprehensive evaluation with cross validation strategies!

Just wondering these problems were all integer based optimizations (TSP) and how MIP mixed integer programming stacks up?

I made a customizable optimization algorithm called kernelml (publicly available but the PSO backend is not open source yet) I would be more than happy to share it with someone with a deep understanding of optimization.

freedomtowin/kernelml

Also please feel free to add me on LinkedIn

Rohan Kotwani - Data Scientist, Principal - ManTech | LinkedIn