Unverified50% confidenceFactExact time
TTFT (time to first token) is mainly determined by the prompt processing (prefill) stage and is approximately linearly correlated with the number of input tokens.
1
Sources
50%
Confidence
Long-term
Relevance
10/16/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedTime to First Token (TTFT) refers to the interval between the user pressing Enter and the first character appearing on screen, and is a key metric that determines the interactive user experience.76% similarUnverifiedStreaming processing requires all three stages of STT, LLM, and TTS to work incrementally; VAD is used to determine whether the user has finished speaking, and its sensitivity setting is a trade-off between latency and false interruptions; the interruption mechanism requires that when the user interjects mid-way, the system immediately stops the current TTS playback and clears the subsequent inference queue.69% similarUnverifiedReusing the KV cache of identical context prefixes across requests can reduce redundant computation in the prefill stage, thereby lowering time-to-first-token (TTFT).68% similarUnverifiedCommon architectural patterns for addressing state drift include setting a state TTL with forced refresh upon expiration, introducing event-driven mechanisms where external systems actively push state changes, and executing a read-validate-write process before critical decisions.65% similarUnverifiedThe ability to replay execution from an intermediate node is critical because LLM calls have latency and are typically billed per token, avoiding the need to re-run the entire process from the beginning each time.64% similar
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