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Merge pull request #3885 from pipecat-ai/mb/latency-breakdown

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Add latency breakdown to UserBotLatencyObserver
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Mark Backman
2026-03-02 19:27:35 -05:00
committed by GitHub
parent 141b0ee014 7dbb130666
commit aad1211a57
6 changed files with 844 additions and 24 deletions
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changelog/3881.added.md
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- Added `StartupTimingObserver` for measuring how long each processor's `start()` method takes during pipeline startup. Also measures transport readiness — the time from `StartFrame` to first client connection — via the `on_transport_readiness_measured` event. Useful for diagnosing cold start slowness and identifying initialization bottlenecks.
- Added `StartupTimingObserver` for measuring how long each processor's `start()` method takes during pipeline startup. Also measures transport readiness — the time from `StartFrame` to first client connection — via the `on_transport_timing_report` event.

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- Added `on_first_bot_speech_latency` event to `UserBotLatencyObserver` measuring the time from client connection to first bot speech. An `on_latency_breakdown` is also emitted for this first speech event.

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- Added `on_latency_breakdown` event to `UserBotLatencyObserver` providing per-service TTFB, text aggregation, user turn duration, and function call latency metrics for each user-to-bot response cycle.