I'd say that it's a pre-optimization if you're debating between python and c++. Namely, expressiveness vs performance. In the case of go, a lot of people feel l

I'd say that it's a pre-optimization if you're debating between python and c++. Namely, expressiveness vs performance. In the case of go, a lot of people feel like it gives you about the same amount of expressiveness, while also giving a shit ton of performance. So, in this case, I wouldn't say it's a pre-optimization. It's just being smart about the tool you select to solve the problem at hand.