Wikipedia Live

A live product on a real public firehose, built on n6k Streaming. data.py subscribes to Wikimedia's EventStreams (every edit on every wiki, 50–100 a second) and does the work the browser can't: it reduces that torrent to one clean row per second. Along the way Python tracks the rolling edit rate, flags live surges against a moving baseline, and keeps a top-domains leaderboard.

The browser only ever sees that 1 Hz stream. One connection opens it and fans it to three independent consumers (the KPI row, the rate chart, and the leaderboard), each repainting on its own as rows arrive. No aggregation runs client-side; every number below was computed in Python before it crossed the wire.