I am solving an NP-Hard problem(say TSP). And then later on would like to take much larger scale/real-life problems with more constraints. The ultimate problem is a combianorial optimization NP-Hard problem.

Now, Considering the metaheuristic side, there are many algorithms:GA,PSO, etc

How to know which algorithm is the best? Since every other algorithm is available in its discrete form. Also it would be good if some pointers are given as to how to gauge based on the problem definition and the solution methodology of the algorithm, if its suitable for our problem.

Thanks

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