Turn processing extremely slow

Started a new game with 1.58 and BM 1.10 with FQM Beta 11 or what the latest was.
The game takes ages for player 9, the green is there for a long time... but its not only him..

SEV only uses max. 55%, thats what the task manager is telling me.. is that called multithreading? Yes, I set it to TRUE in settings.txt!
The whole turn process took 13 MINUTES!! I'm at game date 2410.1.

So... is this normal? Because it makes the game unplayable! Are there any hidden options in some files to make it faster?

edit: I have in this game at least 50 systems. Don't think thats too much for the game to handle...