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Add nearest dispatch, CPU and CUDA kernels#592

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akihironitta wants to merge 1 commit intoport-cluster-07-radiusfrom
port-cluster-08-nearest
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Add nearest dispatch, CPU and CUDA kernels#592
akihironitta wants to merge 1 commit intoport-cluster-07-radiusfrom
port-cluster-08-nearest

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New C++ CPU kernel (brute-force pairwise + argmin) replacing the
original scipy fallback. CUDA kernel uses shared-memory argmin
reduction with 1 block per query point. Tests included.
@akihironitta akihironitta force-pushed the port-cluster-07-radius branch from e35b9d1 to d1c8562 Compare March 16, 2026 07:37
@akihironitta akihironitta force-pushed the port-cluster-08-nearest branch from 335ec20 to 107c05f Compare March 16, 2026 07:37
@github-actions github-actions bot removed the ci label Mar 16, 2026
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