So, in our website we are using SiteMap. For each request we render some menu and to do that we do SiteMap.RootNode in the helper function.

Now, when I have done the profiling of my website using dotTrace, I saw the get_RootNode() is taking lot's of time(around 70-75 millisecond). But we know that the SiteMap is static. So, I am thinking in somehow I will get the SiteMap.RootNode only once in Application_Start and will access that through out each request.

So, my questions are,

Is my approach correct? How should I do that? Or is there any efficient way that I can use SiteMap.RootNode

Thanks.