TSP time complexity

I tried to solve a TSP that without returning to depot using Vehicle Routing Algorithm. With the default setting and 50 nodes in the problem, it takes me 3 seconds to calculate the best solution. Is that normal? and how can I speed that up?

Best regards

This doesn’t say anything about your problem? What job type are you using, shipment or service? How many vehicles you have? What number do you have in maxIteration? How many threads you are using?

At the end, algorithm should speed up, this is heuristic problem, nothing good cannot come out with lesser time.