Unverified50% confidenceFactExact time
每条DNS记录都附带TTL值，指定递归解析器可缓存该记录的秒数，常见设置从300秒到86400秒不等
1
Sources
50%
Confidence
Long-term
Relevance
8/12/2026
First Seen
Sources
Related Claims
UnverifiedDNS TTL is typically set to 300–86400 seconds; a longer TTL reduces upstream query pressure but slows the propagation of changes.79% similarUnverifiedA typical DNS TXT record query consumes only approximately 100–500 bytes of network traffic, with response latency typically between 10–100 milliseconds.76% similarUnverified缓存命中时prefill阶段可跳过已缓存部分，TTFT可从数秒压缩至毫秒级75% similarUnverifiedSTT、LLM、TTS三段串行叠加，仅处理延迟就超过650毫秒，不包括服务间网络跳转耗时74% similarUnverified在高并发场景下，一个平均延迟180ms的TTS服务大约每8次响应就有1次飙到400ms以上72% similar
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