The game is in Alpha state and has just been released in Early Access. They are fixing bugs and begin just now optimizing the game as it is just of now a full time job for them (was a side project before EA). So keep calm and have a drink with us. We are all waiting for those sweet sweet optimizations
I know that Just wanted to know the reason. Normally Pathfinding is killing at least one core to 100%. (non parallel programming). But this was strange for me.
I tried only assigning one core to the game, but that made it even worse. This is a pure optimization thing that has to be done by the devs
Here is for hoping