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Notes from the edge.

Field reports and technical deep-dives from the team turning the world's raw signal into decision-grade data - what we measure, what broke, and what the numbers actually mean.

Latest·Engineering·Jul 24, 2026

The half-interval tax

A polling pipeline is late by half its interval before anything goes wrong. Here is the arithmetic, and why a shorter interval is the wrong response.

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Notes from operating the network.

The writing here comes out of running the thing: what it takes to hold connections open across every region we cover, why clock synchronization turns out to be a correctness problem rather than a housekeeping one, and what a latency figure has to include before it means anything.

We would rather publish one piece with a measurement in it than four with a thesis. If you want the vocabulary rather than the argument, the glossary defines the terms these pieces lean on, and the edge network page explains the architecture they keep referring back to.

The recurring subjects are the ones that decide whether a dataset can be trusted: how event time is established and why arrival time is not a substitute, what a delivery guarantee obliges a consumer to handle, why point-in-time history is the difference between a backtest and a story, and what changes for a research desk when provenance travels with every record rather than living in a report.