Get the post permalink within the loop but without additional DB query

Hi, I am looking to create a custom ‘directory’ page which will link to several thousands of posts. Because of the large number I am trying to limit the number of DB queries. I notice that to link to each post, I am calling get_permalink() and this is creating an extra DB query for each post.

Is there anyway to retrieve the post permalink without an additional query? I have tried passing the $post object which doesn’t seem to help. I’ve also had a look at the core function, and noticed passing the whole object along with a $post->filter = ‘sample’ value will avoid an additional get_post() call as per:

http://wordpress.stackexchange.com/questions/28933/why-does-get-permalink-produces-an-add-db-request-without-post-filter

But it still seems to be causing an extra query. Any ideas?