Add custom GPU inference code / remove cupy dependency#458
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Add a KnnQuery class for querying top-k related items on the GPU. This lets us remove the cupy dependency, which for the small amount of functionality we need (top-k / random / matrix multiplication) required a 900+mb package to be installed. Currently this is only slightly faster than the cupy version (20%) but will become faster as we move towards batch processing and faster top-k selection algorithms for small k.
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Add a KnnQuery class for querying top-k related items on the GPU. This lets us remove
the cupy dependency, which for the small amount of functionality we need (top-k / random
/ matrix multiplication) required a 900+mb package to be installed.
Currently this is only slightly faster than the cupy version (20%) but will become faster
as we move towards batch processing and faster top-k selection algorithms for small k.