knn_distances	knn_distances
knn_elements	knn_elements
knn_next	knn_next
knn_optim	knn_optim
knn_optim_parallel	knn_optim_parallel
knn_optim_parallel2	knn_optim_parallel2
knn_optim_parallelf	knn_optim_parallelf
knn_past	knn_past
