August 2026 Summaries

Agent join latency, the interval between dispatching an agent and its readiness in a LiveKit room, is distinct from conversational latency and can affect first impressions through ringing calls, silent clients, blank avatar screens, frontend timeouts, abandoned sessions, or rare token-expiration errors. Delays usually occur outside the server-to-worker handoff and commonly result from cold starts on LiveKit Cloud, unrealistic traffic bursts, large container images, blocking entrypoint code, avatar startup time, or insufficient warm capacity and poorly configured autoscaling in self-hosted deployments. Virtual avatars can extend the critical path because agents may wait for video to be published before speaking, while provider selection and avatar metrics can help assess performance. Self-hosted systems should maintain an appropriate pool of idle processes without exhausting CPU or memory, avoid burstable instances, and investigate warnings that no warmed process is available. Join time can be measured by correlating timestamps before dispatch and after the agent connects, while agents that never join may stem from mismatched agent names, token-based dispatch in pre-existing rooms, exhausted worker capacity, or blocked network traffic.