[brancz]

Prometheus gives you CPU/memory total metrics, the profiler used in the article gets you much higher resolution: down to the line number of your source code.

If you're looking to optimize your project I would recommend using a profiler rather than metrics that just tell you the total.

(disclaimer: I'm the founder of the company that offers the product shown in the blog post, but I also happen to be a Prometheus maintainer)

[Blackarea]

Yeah my comment wasn't that well thought through. Obviously if I want to find bottle necks in my code profiling is what I want. If I want to monitor actual load and peaks in prod I wanna go for some kind of monitoring. I have good experiences with Prometheus, but I went with sysinfo crate. Which is probably lightyears more basic/big picture. I love that I can just record my own metrics log them to csv and summarize peaks for live view exposed through axum in html. It's neat for my toy project which doesn't aim for industry standard.