Scenario
Round-trip latencies for chained requests eth_getBlockByNumber(latest, false) and eth_getLogs(hash) with start-to-start throttling of (at least) 1100 ms for every request.
Also, block number consistency with block availability and block age. The block propagation comparison is conservative and latency-agnostic.
Of the possible 31 regions, 2 were selected for data collection: Columbus, OH and Frankfurt.
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.
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Findings
| Endpoint | Lagging | Unique | Lowest | Arrival Tms | Arrival Region | Highest | Arrival Tms | Arrival Region |
|---|---|---|---|---|---|---|---|---|
| A. orbital-falling-gadget.ethereum-sepolia.Quiknode.pro | 0 | 4 | 10,918,395 | 1,779,704,734,883 | Frankfurt / AWS | 10,918,398 | 1,779,704,763,518 | Frankfurt / AWS |
| B. ethereum-sepolia.core.Chainstack.com | 2 | 4 | 10,918,395 | 1,779,704,734,913 | Columbus, OH / AWS | 10,918,398 | 1,779,704,763,547 | Columbus, OH / AWS |
We detected 2 responses whose sendTms, arrivalTms and number were such that we can state the endpoint was lagging in the respective region.
E.g. on arrivalTms=1,779,704,737,085 in Frankfurt / AWS, we received number 10,918,396 from A. orbital-falling-gadget.ethereum-sepolia.Quiknode.pro. Afterwards, on sendTms=1,779,704,737,087 we dispatched a request to B. ethereum-sepolia.core.Chainstack.com, which returned lower number 10,918,395 at arrivalTms=1,779,704,737,118. Therefore, B. ethereum-sepolia.core.Chainstack.com was lagging because it was returning lower number 10,918,395 well after A. orbital-falling-gadget.ethereum-sepolia.Quiknode.pro advanced to 10,918,396.
Details
Latencies exclude one warmup request per endpoint in each region. Additional columns are visible when you scroll to the right.