use CDFs not histograms

https://brooker.co.za/blog/2022/09/02/ecdf.html

Histograms are a rightfully popular way to present data like latency, throughput, object size, and so on. Histograms avoid some of the difficulties of picking a summary statistic, or group of statistics, which is hard to do right. I think, though, that there's nearly always a better choice than histograms: the empirical cumulative distribution function (eCDF).

Found via Dan Luu on twitter, who advocates also including a PDF (Proabability Density Function wiki)