[KongchangAI]
ConceptTime to First Byte / 首字节时间

TTFB

Time to First Byte (TTFB) is a core metric for measuring the responsiveness of network or streaming systems. It denotes the elapsed time from when a client sends a request to when it receives the first byte of data, and is used to evaluate real-time performance in voice AI and streaming applications.

Timeline (last 90 days)

Oct 12

Using only completion time as an optimization metric obscures time-to-first-byte (TTFB/TTFT), which is critical to real user experience.

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Oct 11

When evaluating voice AI system performance, TTFB should be used as the primary SLA metric rather than average processing time.

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Oct 1

Common dimensions in voice Agent evaluation include time-to-first-byte (TTFB), speech-to-text accuracy, the Agent's ability to recover state after being interrupted, and the consistency of intent understanding across multi-turn conversations.

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