entity framework - Loading most related entities of an object is very slow -


continuing earlier question described schema (repeated here convenience):

parties ( partyid, clientid, addressid, datetime ) tents ( partyid, tentdetails... ) clowns ( partyid, addressid, clowndetails... ) securityagentassignment ( partyid, agentid, fromtime, untiltime ) addresses ( addressid, street, city, state )

....and there's 10 other tables of similar design: in many-to-one relationship parties.

my asp.net mvc web application has summary page displays every detail party. i'm using ef1.0 have own eager-loading. here's logic i'm using:

party dbparty = getparty(partyid);  dbparty.tents.ensureloaded(); dbparty.clowns.ensureloaded(); foreach(clown clown in dbparty.clowns) clown.address.ensureloaded(); dbparty.security.ensureloaded(); foreach(securityagentassignment assignment in dbparty.security) assignment.agent.ensureloaded(); // , 10 other relationships

the code above takes 3 seconds run. given isn't eager-loading, lazy-loading, surely should fire off 15 simple select queries , done?

i don't have sql server profiler installed, , don't know how sql generated when you're using .load instead of iqueryable.

i use these extension methods helpers:

private static readonly r.fieldinfo    _entityreferencecontext = typeof(relatedend).getfield("_context", r.bindingflags.instance | r.bindingflags.nonpublic ); private static readonly r.propertyinfo _relatedendowner        = typeof(relatedend).getproperty("owner", r.bindingflags.instance | r.bindingflags.nonpublic );  private static boolean isattached(this relatedend relatedend) {      object context =  _entityreferencecontext.getvalue( relatedend );     return context != null; }  public static tentity ensureloaded<tentity>(this entityreference<tentity> eref) tentity : class, ientitywithrelationships {      // entityreference<tentity> derives relatedend.     relatedend erefasrelatedend = (relatedend)eref;      erefasrelatedend.ensureloaded();      return eref.value; }  public static void ensureloaded(this relatedend end) {      ientitywithrelationships owner       = (ientitywithrelationships)_relatedendowner.getvalue( end, null );     entityobject             ownerentity = owner entityobject;      if( ownerentity != null ) {          if( ownerentity.entitystate == entitystate.added || ownerentity.entitystate == entitystate.detached ) return; // calling .load on added object causes exception.     }      if( end.isattached() && !end.isloaded ) end.load(); }

this question moot - connecting database server on vpn connection. thought okay ping time 50ms between computer , database server, forget how chatty sql server is. considering fires off 60 queries @ once makes sense 60 * 50ms == 3000ms.

when retried application on same lan server (ping time < 1ms) whole load operation executes in under 30ms no need further optimization. problem solved.


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