prefix caching in llama.cpp with MLX

[vrambandit]

Good point. I ended up in about the same place using llama.cpp. I got better results once I stopped chasing one metric and just looked at whether the

I'd approach it in a boring order. If you're on PyTorch, 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.