Each time a template is loaded in ExpressionEngine is goes through a couple of member related tasks (as far as I can see):-
- Is this user in a blacklist?
- Grab the current session data
- Get the information about the current member
- Update the session information with this new visit
- Fetch the CSRF token
I found the above behaviour in the output, so perhaps they don't even run the above processes for the normal guest user.
But assuming a couple or all of them do - it seems quite heavy handed for a site that doesn't require memberships.
Is there a way to disable this?