Unverified50% confidenceFactExact time
CDN caching follows a key-value model: the cache key is usually the full URL of the request (including the query string), the value is the response content, and on a hit the cached value is returned directly without going back to the origin.
1
Sources
50%
Confidence
Long-term
Relevance
10/17/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedPersistent KV caching serializes key-value vectors to disk or object storage, allowing historical context across sessions and requests to be loaded directly, bypassing recomputation.65% similarVerifiedThe core principle of prompt caching is cross-request reuse of the KV Cache, where already-computed KV states can be cached and reused when multiple requests share the same prefix.65% similarUnverified语义缓存（Semantic Cache）通过计算新查询与历史查询的向量相似度，超过阈值时直接返回缓存答案，GPTCache等开源工具实现了这一机制，通常与TTL机制结合63% similarUnverifiedThe foreground cache serves as a complement to, rather than a replacement for, the global cache; the global cache retains overall context while the foreground cache provides purer target semantics.62% similarVerifiedIn the Prompt Cache mechanism, when the prefix content of an API request is identical to a previous one, the system reuses the already-computed KV cache to complete cache reads at a lower price, while cache write is the billing item for the first time content is written into the cache.62% similar
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