Neural TTS Caching Strategies
performance
ttscachingoptimization

Neural TTS Caching Strategies

From 800ms to 90ms P95

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Jan 5, 2026/performance/1 min read

Our multi-tier caching approach reduced p95 latency from 800ms to 90ms while cutting compute costs by 73%.

Text-to-speech at scale means pre-generating thousands of audio segments.

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The Three Tiers

Tier 1 — Static Cache: Common phrases served from CDN edge. Latency: 15ms.

Tier 2 — Semantic Cache: Similar sentences share prosody models with variable segment splicing. Latency: 45ms.

Tier 3 — Live Generation: Novel sentences hit inference cluster. Latency: 180ms.

Combined effect: p95 dropped from 800ms to 90ms. Monthly compute costs fell by 73%.

TAGS:ttscachingoptimization
Back to RadarJan 5, 2026 / VIBE WING