About

A personal project, kept small on purpose.

The question that started it was narrow: when a page feels slow, is it the site or is it the path to it? Answering that properly needs a baseline — a long, dull record of what the same request costs on an ordinary day. So this box makes that request, once a minute, and draws the result.

Six endpoints was the number that fit on one screen without scrolling. They were chosen for being large, stable and unlikely to mind: a once-a-minute request from a single host is less traffic than one person reading one article.

How it is built

• A single Python process holding the probe loop and the HTTP server.
• A WebSocket that pushes each new round of results, so an open tab stays current without polling.
• Charts drawn as plain SVG in about two hundred lines — no charting library, no fonts or scripts loaded from anywhere else.
• Two hours of history in memory, mirrored to one small file so a restart does not start from an empty chart.

No accounts, no cookies, no analytics, nothing stored about anyone who visits. The only state on the server is the list of response times above.