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Spent some time on this today and wanted to compare notes.
I've gone back and forth between llama.cpp and vLLM for Gemma. The interesting difference for me has been prefill/decode split.
Interested in tradeoffs more than fan loyalty.
trying not to rebuild again
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I think the bottleneck is somewhere else. I wouldn't optimize around that first. On my side the bigger swing came from the runtime and not the model.
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What worked for me was pretty simple. If you're on LM Studio, I'd confirm the version first and then reduce variables until the behavior is obvious. A lot of these threads end up being one bad config plus a pile of conclusions drawn from it.
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worth checking the driver first.
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Need a little more detail here. Is this local-only or are you routing anything externally?
mostly local
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Did a small comparison this afternoon. My result was mixed: first run looked bad, second run looked normal. The surprise was that memory pressure showed up before throughput collapsed.
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same here on my side.
small models can still be good
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I don't think that's the whole story. The reported numbers can look compelling, but in ordinary usage I didn't see the same benefit. Worth testing the simpler explanation before adopting the more interesting one.