Steven Gonsalvez

Software Engineer

YOUR LLM IS REPEATING WORK IT DOESN’T NEED TO REPEAT. That’s why KV cache matters. Imagine a conversation with 2,000 tokens of context. You add one more token. Without KV caching, the model recomp

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KV cache explainer; core LLM mechanics, no novel detail

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That’s why KV cache matters.

Imagine a conversation with 2,000 tokens of context.

You add one more token.

Without KV caching, the model recomp

> KV cache explainer; core LLM mechanics, no novel detail

YOUR LLM IS REPEATING WORK IT DOESN’T NEED TO REPEAT.

That’s why KV cache matters.

Imagine a conversation with 2,000 tokens of context.

You add one more token.

Without KV caching, the model recomputes attention keys and values for the existing context.

With KV caching, it reuses the stored keys and values and computes them for the new token.

The difference:

WITHOUT KV CACHE Recompute previous K/V states → Generate next token

WITH KV CACHE Reuse previous K/V states → Process new token → Generate next token

This reduces repeated computation during autoregressive generation.

But there’s

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