If you're only thinking of performance as "profiling", you're missing the architecture step. Why make something faster if you can skip it altogether. It's rare

If you're only thinking of performance as "profiling", you're missing the architecture step. Why make something faster if you can skip it altogether. It's rare when performance issues happen at the line level, unless you're doing CPU intensive tight loops. I can't remember the last time I had to optimize for that, but maybe I'm just not in the right field. However what I constantly have to optimize for is IO and latency. And for that, all you can do is a proper architecture.