Are you creating a new SessionFactory each run? (SLOOOOOOOOOOOW!!!)

You should use a single instance SessionFactory and just create new 
sessions.

F.B. ten Kate wrote:
> Hello there, im currently looking at some differences between both
> ORM's and to get a good feel for both i try to query from one table
> and simply drop all the data in a DataGridView.
>
> Easy as pie right?
>
> Now here is the different SQL's beeing generated
>
> NHibernate:
>
> "SELECT this_.Debiteur_ID as Debiteur1_0_0_, this_.Debiteurnaam as
> Debiteur2_0_0_, this_.Entiteit_ID as Entiteit3_0_0_, this_.Sorteernaam
> as Sorteern4_0_0_, this_.DatumWijziging as
> DatumWij5_0_0_, this_.Actief_NeeJa as Actief6_0_0_ FROM tbl_Debiteur
> this_"
>
> Enitity Framework:
>
> "SELECT
> [Extent1].[Actief_NeeJa] AS [Actief_NeeJa],
> [Extent1].[DatumWijziging] AS [DatumWijziging],
> [Extent1].[Debiteur_ID] AS [Debiteur_ID],
> [Extent1].[Debiteurnaam] AS [Debiteurnaam],
> [Extent1].[Entiteit_ID] AS [Entiteit_ID],
> [Extent1].[Sorteernaam] AS [Sorteernaam]
> FROM [dbo].[tbl_Debiteur] AS [Extent1]"
>
> Okay, so sofar EF wins in readability atleast but i dont intend to
> actually look at the queries so i'm not worried.
>
> I noticed that NHibernate was ALOT slower then EF, the reasons seemed
> like a mistery to me so i ran SQL Profiler.
>
> When i run the NHibernate project the query runs for a duration of
> 19369 (milliseconds)
>
> Then i run Enitity frame work which runs for a duration of 3621
> (milliseconds)
>
> (I clear caches between the different queries)
>
> I then run the query in SQL Management Studio, The NHibernate has a
> duration of 4291 (milliseconds)
> I do the same for the Enitity framework which has a duration of 4291
> (milliseconds)
>
> Can anyone explain to me these durations? mostly the NHibernate time
> when running it from application code is HUGE. Eventhough the SQL is
> exactly the same...
>
>
>
> >
>
>   


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