Eliminated a bunch of usermeta queries from the Write Post page.

Sped up the main query for the Manage Comments page. Shaved some time from wp_list_categories() and wp_dropdown_categories(). Working on the category dropdowns and checkboxes on the Write Post page next.

Consolidated three comment count queries on the Manage Comments page down to one.

Eliminated a slow query in the Dashboard. Trying to consolidate some other Dashboard queries.

Speeding up the Write Post page by loading the full category list only once the “All Categories” tab is clicked. The much shorter “Most Used” categories list is displayed by default. If you have hundreds or thousands of categories this speeds up page load time nicely.