Unverified50% confidenceFactExact time
In TTS (Text-to-Speech) contexts, Time to First Byte (TTFB) refers to the time between when the API receives text input and when it returns the first playable audio data chunk.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/2/2026
First Seen
Valid until: 9/30/2026
Sources
Related Claims
Unverified首字节响应时间（TTFB）反映从请求发出到模型返回第一个token之间的延迟，涵盖网络传输、请求队列等待和模型预热时间74% similarUnverifiedTTFT（首个token生成时间）是衡量LLM用户体验的核心指标，决定用户从提交请求到看到第一个字符的等待时长74% similarUnverifiedTime-to-Value（TTV，价值抵达时间）指用户从首次打开产品到感受到核心价值的时间间隔，被现代PLG模式视为北极星指标之一64% similarUnverified根据Meta和TikTok官方数据，用户在信息流中对单条内容的平均判断时间不到1.7秒52% similarUnverifiedContext Caching功能可以显著减少首Token生成时间（Time to First Token）50% similar
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