Jonas Lindberg wrote: [...]
While one can argue it's a little prettier, I don't think it's very practical. Making this change at scale requires very significant work and comes at a significant cost in traffic increase (consider user with >1000 mostly offline friends). It will also result in worse user experience
actually, what is the estimate for average online friends per user? 0.3 or even lower?A sensible approach might be for the contacts server to reply with unavailable if the contact has been online recently (within the last
24 hours?) and not to reply at all if the contact has been offline for weeks. Anyway... -1 on "MUST".
for users with large rosters on low bandwidth connections, like the common scenario of a cell phone.
The users server might filter the unavailable presence if that is the "expected" or known state of that contact. philipp
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