[wp-trac] [WordPress Trac] #11914: "Users" admin list slow to generate on large sites

WordPress Trac wp-trac at lists.automattic.com
Fri Jan 15 20:12:03 UTC 2010

#11914: "Users" admin list slow to generate on large sites
 Reporter:  rowanbeentje  |       Owner:                        
     Type:  defect (bug)  |      Status:  new                   
 Priority:  low           |   Milestone:  Future Release        
Component:  Optimization  |     Version:  2.9.1                 
 Severity:  minor         |    Keywords:  users mysql slow query

Comment(by miqrogroove):

 Guys, I'm really confused by this query.  This would be the pseudo code:

 Count all posts, WHERE one specified user is the author, AND current user
 is the author OR has private reading caps.

 Problem #1:  get_usernumposts() is being called from inside of user_row(),
 which is the worst possible flow of control for query optimization.

 foreach ( $wp_user_search->get_results() as $userid ) {
         echo "\n\t" . user_row($user_object, $style, $role);

 Problem #2:  Why would the current user's capabilities ever affect the
 number of posts that have been created by someone else?

Ticket URL: <http://core.trac.wordpress.org/ticket/11914#comment:9>
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