LLM inference bottlenecks: weight loading gave way to KV reads as contexts grew
YouJiacheng · x · 2026-09-11
YouJiacheng argues speculative decoding doesn't change the nature of inference bottlenecks — the model and workload do: with short early contexts, weight loading dominated; long-context workloads shifted the bottleneck to KV cache reads.
A short but substantive note on how LLM serving performance limits evolve.
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