In my understanding, performance is based on the value of a measure improving in one way or another.
Efficiency is relative to the amount of resources required to achieve a similar result. To use the car example above, a car that can do 100km/h at 4L/100km is more efficient than another can than do 100km/h at 8L/100km.
The point of absolute efficiency is referred to as optimum. Essentially, top performance possible with the minimum of resources possible.
Efficiency is relative to the amount of resources required to achieve a similar result. To use the car example above, a car that can do 100km/h at 4L/100km is more efficient than another can than do 100km/h at 8L/100km.
The point of absolute efficiency is referred to as optimum. Essentially, top performance possible with the minimum of resources possible.