Editing OpenSimulator Internals/Connector Architecture/Simulation Connector (section)

==== UpdateAgent(destination, AgentPosition) ====

Position-only update. Called frequently during avatar movement.

Deduplication via m_updateAgentQueue dictionary keyed by URI:
* First thread for a URI becomes the worker; subsequent threads update the map and return
* Worker loops, sending the most recent position until no new update arrives
* On send failure: blacklists the destination URI for 120 seconds via _failedSims ExpiringCache
* Blacklisted destinations return false immediately without attempting contact

Private UpdateAgent(destination, IAgentData, ctx, timeout) handles the actual PUT:
* Uses PutToServiceCompressed
* If OutboundVersion >= 0.3: returns immediately on success
* If OutboundVersion < 0.2: falls back to uncompressed PutToService on failure