How to make an object move with same speed?

Hello, I have a complex map with lots of turns. I used the cinemacine to record a movement of an object along the path. The problem is that it's impossible to make the object move at the same speed all the way.

I know it's possible to use pathfinding, but I avoided it because it's expensive. Especially if you think I use it for mobile app.

Is there a way to achieve the same results without passing the processing power?