Guided lab · synthetic data

Refresh-Time Sampling

Choose a stream pattern, step through causal arrivals, and observe when a complete row forms, when it is stale, and which updates the representation does not retain.

4.0 s
Arrivals revealed0 / 0
Refresh rows0
Latest statusWaiting
Discarded updates0
Visible tail0

Availability timeline

Diamonds are selected sources; outlined dots remain visible as loss or tail.

Waiting for all
Synthetic asynchronous stream arrivals and refresh barriers Three instrument lanes display revealed and future updates, selected sources, unrepresented updates, unmatched tail records, and complete refresh barriers.
Selected sourceDiscarded before a barrierVisible unmatched tailNot yet available

Refresh audit

RowBarrierControllerStatusMax ageArrivals A/B/GDiscarded

Keyboard: Left Arrow = Back, Right Arrow = Step, Space = Play/Pause. All records are deterministic synthetic teaching data. Loss counts representation omissions, not economic importance or statistical bias.