Currenlty I'm working on my thesis work about Tourism optimization, that contain both Knapsack and VRP solvers from OR-tools. At this point I need some theoretical background about OR-tools.
After internet search I didn't find any information I looked for. My main concerns are:
1. How does it work in a nutshell?(in comparison with other solvers)
2. Is it using any known algorithms as Gradient Decent or other or it developed it's own?
3. What are the key factor making OR-tools faster than other solvers?
I understand that all this information might be confidencial, and that's why there's nothing on internet. I hope for any clarification on this topic and will be grateful for any useful information.
