Prevent dynamic set from being run on every cube connection.

I have a top 25 dynamic set in my cube on a large dimension. Every new connection to the cube I can see the cube executing the code in the dynamic set. This takes about 10-15 seconds which is too long just for a connection.

Is it possible to not have SSAS execute the set each connection? If not are there any alternatives?

Create Dynamic Set CurrentCube.[Top 25 Merchants] AS
TopCount
    (
       [Trans_Merchant].[Merchant].[Merchant].Members,
       25,
       [Measures].[# of Transactions]
    )