Jose,
You have not been forgotten
It seems to be related to the -server parameter. If you omit this parameter, the performance is a lot better and more stable.
I jut tried it with a build of v17.0 where a run with the -server parameter took between 20 secs and 22 minutes to end. If I run it without the -server parameter, all three instances took less than 14 seconds to finish.
After this I can run it witht he -server parameter and now it takes between 12 and 60 seconds for MapInfo Pro to launch and finish again.
We are still investigating this