Unverified50% confidenceFactExact time
由于CPython使用引用计数垃圾回收，即使子进程仅读取共享数据也会触发写时复制机制，导致内存被复制到每个子进程
1
Sources
50%
Confidence
Long-term
Relevance
8/12/2026
First Seen
Sources
Related Claims
UnverifiedIn 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.64% similarUnverifiedAnthropic's Prompt Caching feature allows frequently repeated long contexts (such as system prompts, codebases, and documents) to be cached on the server side.63% similarUnverifiedThe Flush+Reload attack exploits the physical sharing characteristics of shared memory pages and the CPU last-level cache, inferring the victim's memory access patterns with nanosecond-level precision by measuring the time difference for cache line reloading.62% similarUnverifiedPrefix Caching technology persistently stores already-computed KV vectors on the server side, allowing direct reuse when new requests share a large number of repeated prefixes with previous requests, with the matched portion billed at the cache price.62% similarUnverifiedThe 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.60% similar
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