Minor - Add comment about slowliness of query

10 years ago · faf8cdd574
parent ebee072d76
commit faf8cdd574
1 changed files with 2 additions and 1 deletions
--- a/main/inc/lib/usermanager.lib.php
+++ b/main/inc/lib/usermanager.lib.php
@ -2751,7 +2751,8 @@ class UserManager
                if ($session_visibility == SESSION_INVISIBLE) {
                    continue;
                }
-
+                // This query is horribly slow when more than a few thousand
+                // users and just a few sessions to which they are subscribed
                $id_session = $enreg['id'];
                $personal_course_list_sql = "SELECT DISTINCT
                        course.code code,