profiling so as to order greps for mailing lists

I'm on an excessive number of mailing lists.  I've reorded things and
made tree conditionals for lists on a single server -- this improved
performance quite a bit.  However, I would like to profile over say, a
month's time, the number of delivers to the mailboxes, so i can reorder
both within the conditional branches, and without them.  Is there a good
way someone has used to accomplish this?

-- 
Scott