Global idxlist_collection_get_indices (Xt_idxlist idxlist, Xt_int *indices): use memcpy with index_array_cache if available
Global idxstripes_get_indices (Xt_idxlist idxlist, Xt_int *indices): use memcpy with index_array_cache if available
Global idxvec_get_position_of_index_off (Xt_idxlist idxlist, Xt_int index, int *position, int offset): check datatype of variables lb, ub and middle
Global idxvec_get_positions_of_indices (Xt_idxlist idxlist, const Xt_int *indices, int num_indices, int *positions, int single_match_only): try linear scan of sorted data instead (requires performance test first)