Writing

Field notes

Short pieces from clinic markup. They are not vendor roundups.

12 May 2026

Lag windows are not latency

Ingest delay, processing time, and the human decision to wait get collapsed into one adjective: fast.

3 April 2026

No feature shipped. Conversion still jumped. The join was to a slowly changing user table.

18 February 2026

A 10% client sample is honest only if the tile says so and the denominator is the sampled world.

9 January 2026

Volume pages are easy. Definition drift at 00:40 is an ownership problem wearing an on-call costume.