Efficiency per speed level

[GtHbbrr]

What would you like to be added:

On the efficiency dashboard I would like to see the average Wh/km per speed level.

Why is this needed:
efficiency at for example high way speeds on long distance is a subject that is discussed a lot but it is hard to find this efficiency in the car’s statistics

[riesi77]

Sounds like an interesting idea - however I am not sure if there is this doable on the plain current speed level, because speed level changes very fast. On top of that going up or down a hill also may make a difference. As well as the temperature.
What I could imagine is to derive this of the trip's data. Take the average speed during a trip and the consumption (and maybe the average temperature).