Histogram

import { Histogram } from "diagrammatic";

Eighteen 50ms bins, one day of traffic. The dashed outline is the same weekday a week earlier. The shape is the regression; the median is the alibi.

The mass still sits near 350ms, but the right tail past 700ms has thickened since last Wednesday. The last four bins contain 33 requests against 21 a week earlier. The median at 348ms would have called the day fine.

Use it for

The shape of one variable: skew, spread, and outliers.

Watch out

Bin width changes the story; try several before trusting one.