I measured the power consumption to be 500 mW but in my understanding, Teensy is always consuming this much, unless being at deep sleep.

Can I interpret that the "true" power consumption of our code, during that 1 ms period when it's doing the actual computations, is then at most 10 % of the 500 mW (so 50 mW)? And to get more precise measurement, I could first make a program that puts Teensy in deep sleep (e.g., using the deepSleep from the Snooze library), measure the power consumption of that (as it will be more than 0 mW), and use that as a benchmark to be subtracted from the 50 mW?

Or if not, what would be the suggested way to estimate the power consumption of the processor?