this post was submitted on 21 Feb 2025
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LocalLLaMA
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Q4 will give you like 98% of quality vs Q8 and like twice the speed + much longer context lengths.
If you don't need the full context length, you can try loading the model at shorter context length, meaning you can load more layers on the GPU, meaning it will be faster.
And you can usually configure your inference engine to keep the model loaded at all times, so you're not loosing so much time when you first start the model up.
Ollama attempts to dynamically load the right context lenght for your request, but in my experience that just results in really inconsistent and long time to first token.
The nice thing about vLLM is that your model is always loaded, so you don't have to worry about that. But then again, it needs much more VRAM.