Is the query for an existing single post of any post type (post, attachment, page, custom post types)?

Is the query for an existing tag archive page?

Is the query for an existing custom taxonomy archive page?

Is the query for a specific time?

Is the query for a trackback endpoint call?

Is the query for an existing year archive?

Lazyload comment meta for comments in the loop.

Lazyload term meta for posts in the loop.

Iterate current comment index and return WP_Comment object.

Set up the next post and iterate current post index.