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An FP8 KV cache run is 3.4% faster than the BF16 run. Design the A/B that decides whether to ship it.

One run each, one number, 3.4%. Before anyone ships it, the answer separates what the change does from what the GPU, the cache and the admission rule did on the day, and turns the comparison into a procedure whose result comes with an error bar.

Updated Nov 2026 · Worked answers on inference mechanisms, with calculations, implementation details, and follow-up questions.

One run each, one number, 3.4%. Before anyone ships it, the answer separates what the change does from what the GPU, the cache and the admission rule did on the day, and turns the comparison into a procedure whose result comes with an error bar.

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