It sounds like power bi team changes the logic of internal formulas calculation and causes the 'high power usage' issues. In my opinion, I'd like to suggest you can contact to power bi team to report this scenario. (notice: you can attach your device information to help them to confirm if this is a common or specific device optimization issues)
Community Support Team _ Xiaoxin If this post helps, please consider accept as solution to help other members find it more quickly.
There definitely seems to be an issue with power usage on my surface book 2 only.
All models seem to perform fine on other pc's.
I guess I will log with Microsoft, the fan speed increases on the Surface Book, Task Manager shows power bi desktop is using Very High power and power bi desktop is not responsive doing basic tasks like changing font sizes or removing columns etc.
I am having the same exact issue since about November. Even in very small, simple files, changing formatting options and just selecting visuals results in multiple seconds of pause in most cases.
This is pretty hilarious considering that I'm running about 128GB of RAM and a 12-core processor at about 3 Ghz. My colleagues with similar setups are also complaining. I'll also submit a support ticket and include my system info there.