It's common knowledge that due to relativistic effects, accelerating from 0.8c to 0.9c takes a lot more energy than accelerating from 0.1c to 0.2c.
However, what's the case with deceleration? Does it take more or less energy when you are closer to the speed of light?
Due to the conservation of energy it should take the same amount of energy to accelerate from 0 to 0.9c in perfect vacuum than to decelerate from 0.9c to 0. However, is the distribution among the various velocities the same for deceleration and acceleration?