Performance depends very much on what you are doing. Native Python code is much slower than Go, but Python code execution is not the bottleneck in many Python programs. NumPy may be faster than Go and disk IO is the same speed in each.

Go performance would be next tier from Python but memory usage a little less so. The Go team has made great strides in that regard from what it was. The runtime is always getting better, and it's fun to watch.

Rust or native platform (Swift/C# .Net Native, depending) are going to be even more ideal for battery usage.

Proper algorithmic choices are even more important and paramount no matter what is used. It goes without saying that poorly implemented Rust can be bested by well implemented Python.