c# – 有没有办法防止NHibernate LINQ提供程序的布尔性能问题

Createquery和queryover几乎完全相同,性能相同.
然而,LINQ提供商做了一些非常时髦的东西！

var items = (from m in NHibernateSession.Current.Query<Listing>()
                     where m.Active == true
                     select m).Take(10).ToList();

        var items2 = NHibernateSession.Current.CreateQuery("from Listing where Active = :val").SetBoolean("val",true).SetMaxResults(10).List();


        var items3 = NHibernateSession.Current.QueryOver<Listing>()
            .Where(m => m.Active == true)
            .Take(10).List();

来自createquery&的Sql queryover：

select TOP ( 10 /* @p0 */ ) listing0_.PackageID      as PackageID13_,listing0_.MatchComplete  as MatchCom2_13_,listing0_.ExpirationDate as Expirati3_13_,listing0_.Active         as Active13_,listing0_.Archived       as Archived13_,listing0_.Deleted        as Deleted13_,listing0_.UserID         as UserID13_
from   Marketplace.Listings listing0_
where  listing0_.Active = 1 /* @p1 */

来自LINQ的查询：

select TOP ( 10 /* @p0 */ ) listing0_.PackageID      as PackageID13_,listing0_.UserID         as UserID13_
from   Marketplace.Listings listing0_
where  case 
     when listing0_.Active = 1 then 'true'
     else 'false'
   end = case 
           when 'True' /* @p1 */ = 'true' then 'true'
           else 'false'
         end

NH Profiler for LINQ的持续时间为37/91,相比之下为2/2

这应该发生吗？或者我错过了一个配置设置,告诉LINQ将布尔比较转换为位？

谢谢