Scenario
Slot propagation and regional arrival lag.
The probe(s) subscribe with slotSubscribe and capture each slot arrival. Datasets from all regions are merged by slot number to detect the leader and followers for each slot.
Of the possible 31 regions, 2 were selected for data collection: Oregon and Sydney.
Each location probe breaks its processing loop if / when the endpoint response is too-many-requests, a.k.a. HTTP code 429 etc. Also, codes 401 and 403.
At the time of the report generation: 4 of 4 datasets were available from 2 selected regions x 2 endpoints.
Findings
Summary by Dataset
Summary by Slot
Includes only "complete" slots (slots seen by every probe). The p95 of the values in the column "p95" is: 148 ms.
Details
Per slot, leading endpoint-region vs. every other arrival for the same slot, incl. slots not seen by every probe. Regional "wall clocks" are treated as globally synchronized.