Multi query report

 

I have a requirement where I have two queries giving two different outputs, I want these two in one single report with two layouts, I was able to achieve this with Concatenate option and there by build by RTF templates based on the Groups of each query, The problem I found is the performance because everytime view is hit by choosing the required report layout both the queries are running and ther by affecting performance, Is there anyway that when I choose the layout only the query related to that layout is run and other when I choose the other