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Cost, Latency, and Optimization·Lesson 23 of 31·15 min

Prompt Caching and KV Cache

This lesson is for enrolled learners

The concept Caching is how you avoid paying and waiting for work you have already done, without serving the wrong result. In LLM systems you can cache several layers: retrieved chunks for a query, embeddings for a document, model completions for a fully determined prompt, and fragments of a system prompt that a vendor’s prefix cache can reuse. Each layer……

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