How do modern dishwashers take way longer to run and clean better yet use less energy and water?

Question

How do modern dishwashers take way longer to run and clean better yet use less energy and water?

In: 8487

Answer 1

It’s all to do with efficiency, newer models are more efficient but run slower, heat less water at lower temps (sometimes)
Think of a car doing 100mph, it would take 1 hour to go 100miles and say it burns 5 gallons of fuel (20 mpg)

If the car ran at 50mph it would take 2 hours but might get 40mpg so would only use 2.5 gallons.

Same job done, it took longer but was cheaper.