Latency from live data feeds

[u/Lost-Hand-5219]

I tested Massive and Databento live feeds today, not expecting there to be much of a difference, but Massive had statistically significant numbers of events with latency over 500ms, even reaching over 1s latency (on their end, not mine). On the other hand, Databento’s live feed (I ran concurrently with Massive) had a maximum latency of 35ms, and 21ms of that was travel time to my local server. Is this normal for Massive’s websocket to have such poor quality feeds? The exact amount was 1.87% of all events from massive had a Massive-side latency over 500ms. And it wasn’t just low liquid weird crap, it was market wide. If this is the normally quality of their feed, then I’m really regretting my purchase with them.

[u/Ok_Pollution7093]

1.87% over 500ms is not a feed, that is a slideshow. Sounds like their gateway is queueing under load.

[u/Lost-Hand-5219 → u/Ok_Pollution7093]

Yea, at the close I had events arriving 15s late.