Alerts not real time?

[belvdr]

I noticed today that I've received quotes in various threads, but the Alerts flag has not yet lit up for those. Is it not real time?

EDIT: I just received an alert from a different thread, so it seems sporadic.

 

[Floris]

XenForo doesn't "constantly" check with ajax calls. But it tries to do it as logical as it can.
It's not as 'live' as we want it. There are addons on xenforo's site that help improve alerts on xf1.