It's little surprising that the author was doing perf work and not already comparing distributions. As the rest of the article outlines, you learn a lot more with more data!

It's complicated, but really worth learning how prometheus and grafana heatmaps combine if you want dashboards for real time service data. Multimodal distributions are basically the expected outcome given all the caching done in distributed systems.

The median developer doing performance work has no background in the subject, they just have a complaint from someone that something is slow, and no real idea how to solve that problem.

By that standard, this guy is doing quite well. It's a good post.

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