Linq to SharePoint - lookup column causes performance problem

Hi All,

I have a simple line of code:

 this.Shipping2WarehouseTitle = _ts.GetWarehouse();

in the following context:

public partial class Shipping
{
...
internal void SetupTiming(TimeSlotTimeSlot _ts, bool _isDouble)
{
 this.Shipping2WarehouseTitle = _ts.GetWarehouse();
}
....
}

public partial class TimeSlotTimeSlot{
{
....
  internal Warehouse GetWarehouse(){
  ....      
    return this.TimeSlot2ShippingPointLookup.WarehouseTitle;
  }
}

As I am using Linq to SharePoint Warehouse, Shipping and TimeSlotTimeSlot are Entities generated by SPMETAL coupled with the above partial custom code.  Shipping2WarehouseTitle is a lookup column (property) ofWarehouse type.

Question: The execution time of the above mentioned line of code is measured in seconds, but I expect nanoseconds !!

TimeSlotTimeSlot is a value of the reference type, and GetWarehouse() returns it immediately, so why it takes seconds ?!

Is there something magic under the cover.

Mariusz

Mariusz