Runtime, timeouts and the evaluation tests

My implementation is more inefficient than a reference implementation could be: At first, I calculate the local energy of every pixel, and store it in our energy array. Afterwards, global energy is calculated.
As I fear to introduce bugs by changing a running (and working) system, I would like to leave the inefficiency as is.
I think that this roughly doubles the runtime of the calculate_energy function.
My question now is: Do I have to fear timeouts in the evaluation tests? Remark: I pass all public and daily tests.

Your solution seems to be as efficient as the reference implementation. I don’t really see what is suboptimal about it. Perhaps you can share the specific concern you have?