使用ForeignCollection查询或创建对象时,ormLite有什么开销?

我有一张桌子有玩家,另一张桌子上有游戏。它们之间存在玩家----(1..n)[游戏]关系(字段定义可能不完全正确):

// Player
@DatabaseField(generatedId = true)
private int id;
@DatabaseField
public String name;

@ForeignCollectionField(
    eager = true,
    maxEagerLevel = 3)
public ForeignCollection<Game> games;


// Game
@DatabaseField
String title;

@DatabaseField
String playerName;

我想获取并返回所有游戏的列表。让ormLite选择ForeignCollection的开销是什么时候?还是这样做更好:

    final List<Game> allGames = daoGames.getAllGroupedByName();
    final List<Player> allPlayers = gameDao.getAll();

    final HashMap<String, List<Game>> games = new HashMap<String, List<Game>>();
    for (Game currentGame : allGames) {
        final String player = currentGame.playerName;
        if (games.get(player) == null) {
            games.put(player, new ArrayList<Game>());
        }
        final List<Game> gamesOfPlayer = games.get(player);
        gamesOfPlayer.add(currentGame);
    }
    for (Player player : allPlayers) {
        player.games = games.get(player.name);
    }

我猜ormLite会对每个玩家进行查询。与一个daoGames.getAllGroupedByName()相比,这是一个很大的开销吗(尽管甚至不需要groupBy)?