在Hibernate 3.6.10.Final中使用HQL over Criteria时是否有任何性能提升

Question

我在Criteria中有以下查询，需要2分钟才能执行（从方法返回）

public final Data getData(final Long dataid) {
    Criteria dataCriteria = session.createCriteria(Data.class)
    .setFetchMode("mgr")
    .setFetchMode("tmgr")
    .setFetchMode("comp")
    .createAlias("myent","myent", Criteria.LEFT_JOIN)
    .createAlias("myent.party", "pardata", Criteria.LEFT_JOIN)
    .createAlias("slabs","slabs", Criteria.LEFT_JOIN)
    .createAlias("tpr", "tpr", Criteria.LEFT_JOIN)
    .createAlias("tpr.par", "par",Criteria.LEFT_JOIN)
    .createAlias("par.LE_EN", "le",Criteria.LEFT_JOIN)
    .createAlias("le.RAT", "ler",Criteria.LEFT_JOIN)
    .createAlias("c","c",Criteria.LEFT_JOIN)
    .createAlias("c.crd","crd",Criteria.LEFT_JOIN)
    .createAlias("crd.coc", "coc",Criteria.LEFT_JOIN)
    .createAlias("coc.thpr","cocthpr",Criteria.LEFT_JOIN)
    .createAlias("cocthpr.par", "cocpar",Criteria.LEFT_JOIN)
    .add(Restrictions.eq("dataid", dataid));
    return (Data) dataCriteria.uniqueResult();

}

我将它重构为HQL，现在从方法/执行查询返回需要10秒。以下是HQL版本。

public final Data getData(final Long dataid) {        
    StringBuffer qbuffer = new StringBuffer();
    qbuffer.append("select data from com.a.b.c.Data as data");
    qbuffer.append(" left join fetch data.mgr mgr");
    qbuffer.append(" left join fetch data.tmgr tmgr");
    qbuffer.append(" left join fetch data.comp comp");
    qbuffer.append(" left join fetch data.myent myent");
    qbuffer.append(" left join fetch myent.par pardata");
    qbuffer.append(" left join fetch data.slabs slabs");
    qbuffer.append(" left join fetch data.tpr tpr");
    qbuffer.append(" left join fetch tpr.par par");
    qbuffer.append(" left join fetch par.LE_EN le");
    qbuffer.append(" left join fetch le.RAT ler");
    qbuffer.append(" left join fetch data.cd c");
    qbuffer.append(" left join fetch data.crd crd");
    qbuffer.append(" left join fetch crd.coc coc");
    qbuffer.append(" left join fetch coc.thpr cocthpr");
    qbuffer.append(" left join fetch cocthpr.par cocpar");
    qbuffer.append(" where data.dataid = :dataid ");

    Query query = getSession().createQuery(qbuffer.toString()).setLong("dataid", dataid);

    return (Data)query.uniqueResult();
}

有人可以解释一下吗？如果需要，我将提供HBM映射（懒惰/渴望等）。注意 - ＆gt;除了从Criteria到HQL的转换之外，没有其他任何修改。