ego_item_pub API taking long time for updating DFF

Hi,

I am using ego_item_pub API to update DFF i.e. attribute 18, 19, 20 in mtl_system_items_b.

      l_item_tbl_typ (1).transaction_type := ego_item_pub.g_ttype_update;

      l_item_tbl_typ (1).inventory_item_id := l_inv_item_id;

      l_item_tbl_typ (1).organization_id := l_organization_id;

      l_item_tbl_typ (1).attribute21 := p_dff_att18;

      l_item_tbl_typ (1).attribute22 := p_dff_att19;

      l_item_tbl_typ (1).attribute23 := p_dff_att20;

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         ego_item_pub.process_items

                     (p_api_version         => 1.0,

                      p_init_msg_list       => fnd_api.g_false,

                      p_commit              => fnd_api.g_true,

                      p_item_tbl            => l_item_tbl_typ,