Serving is a memory problem: prefill, decode and the KV cache
Originally published at cchinchilla.dev . Part 11 of From code to weights, a 12-part series on ML fundamentals for engineers. Part 10 ended with a trained model. Serving it runs into a limit most software engineers never profile: how fast the machine can read memory. I measured it on my laptop, an…
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- 2026-11-12 14:00 · DEV Community — Machine Learning
Serving is a memory problem: prefill, decode and the KV cache