What is fastest, @Entity or @Embedded?
@Entity
public class UserData {

    @Id private ObjectId id = "UUID 123456789;
    public String userName = "";
    public String password = "";
    @Embedded
    private Statistic statistic;
    @Embedded
    private FriendList friendList;
}

@Entity
public class UserData {

    @Id private ObjectId id = "UUID 123456789;
    public String userName = "";
    public String password = "";
}

@Entity
public class Statistic {

    @Id private ObjectId id = "UUID 123456789;
    public int loginTimes;
    public String gps;

}

@Entity
public class FriendList {

    @Id private ObjectId id = "UUID 123456789;
    public ArrayList<String> fiends;
}

@Entity
public class UserData {

@Id private ObjectId id = "UUID 123456789;
public String userName = "";
public String password = "";
@Embedded
private Statistic statistic;
@Embedded
private List<Friends> friendList;
}