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News/Prefix Sharing Is a Sorting Problem
arxiv
PublishedSeptember 15, 2026 at 4:00 AM
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Prefix Sharing Is a Sorting Problem

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arXiv:2609.13692v1 Announce Type: cross Abstract: LLM serving reuses KV cache by exact prefix match, so when a prompt is assembled from a set of reusable pieces -- retrieved passages, tool definitions, few-shot exemplars -- the order chosen for those pieces determines how much computation can be sha

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