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Question: Why is prefill unbelievably faster in vLLM than other inference engines?

This story is from 2026-09-01. It is preserved in the archive; the latest stories are on the live feed.

I only started using some vLLM forks recently in a 4 x 48GB 4090 system. DS4F - ~5000pp/180tg (DSpark) Qwen3.8 Flash next - ~7500pp/135tg (MTP) This is amazing, like having the API in my house. But it's also really hard to go back. It's weird that we never come close to prefill numbers like this in…

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  1. 2026-09-01 17:05 · r/LocalLLaMA
    Question: Why is prefill unbelievably faster in vLLM than other inference engines?

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