MongoDb游标在游标上迭代非常慢

Question

我正在使用Jongo驱动程序连接Mongo数据库

MongoCursor<T> cursorCollection = collection.find(query).sort({fileAccessKey:1}").as(type);

while (cursorCollection.hasNext()) {
      collectionsAsList.add(cursorCollection.next());
     }

迭代光标需要30秒，记录了1,77,000条记录

谢谢