如何优化/加速一对多的性能

Question

在应用程序中，我们有许多站点和节点。实体是：

public class Site {
    @OneToMany(mappedBy = "site")
    @Cache(region = "visionaelCache", usage = CacheConcurrencyStrategy.READ_WRITE)
    @BatchSize(size = 25)
    private Set<Node> nodes = new HashSet<Node>();
}

public class Node {
    @QueryableRelationship(direction = QueryableRelationship.Direction.PARENT)
    @ManyToOne(optional = true, fetch = FetchType.LAZY)
    @Fetch(FetchMode.SELECT)
    @JoinColumn(name = "site_id")
    private Site site;

    ...

    public void addToNodes(Node node) {
       node.setSite(this);
       this.nodes.add(node);
    }
}

当我们使用mySite.addToNodes(myNode)向网站添加节点时，完成操作需要花费太多时间。有关加快这项行动的建议吗？