Ticket #21120: 21120.3.patch

wp-admin/includes/class-wp-posts-list-table.php

@@ -81 +81 @@
         function prepare_items() {
                 global $post_type_object, $avail_post_stati, $wp_query, $per_page, $mode;
 
+                add_action( 'pre_get_posts', array( $this, 'enable_author_cache' ) );
                 $avail_post_stati = wp_edit_posts_query();
+                remove_action( 'pre_get_posts' , array( $this, 'enable_author_cache' ) );
 
                 $this->hierarchical_display = ( $post_type_object->hierarchical && 'menu_order title' == $wp_query->query['orderby'] );
 
@@ -1055 +1057 @@
                 </tbody></table></form>
 <?php
         }
+
+        /**
+         * Enable author caching
+         * @param WP_Query $query
+         */
+        function enable_author_cache( $query ) {
+                $query->set( 'update_author_cache', true );
+        }
 }

wp-includes/post.php

@@ -5351 +5351 @@
                 update_post_caches( $fresh_posts, 'any', $update_term_cache, $update_meta_cache );
         }
 }
+
+/**
+ * Prime the user cache
+ *
+ * @since 3.5.0
+ *
+ * @access private
+ *
+ * @param array $user_ids
+ */
+function _prime_user_cache( $user_ids ) {
+        foreach ( $user_ids as $user_id ) {
+
+                // Skip if the user is cached already
+                $user = wp_cache_get( $user_id, 'users' );
+                if ( !empty( $user ) && !empty( $user->caps ) )
+                        continue;
+
+                // Get and cache the user
+                $userdata = WP_User::get_data_by( 'id', $user_id );
+                $user = new WP_User;
+                $user->init( $userdata );
+                update_user_caches( $user );
+                wp_cache_set( $userdata->ID, $user, 'users' );
+        }
+}

wp-includes/pluggable.php

@@ -138 +138 @@
         if ( !$userdata )
                 return false;
 
+        $user = wp_cache_get( $userdata->ID, 'users' );
+
+        if ( !empty( $user ) && !empty( $user->caps ) )
+                return $user;
+
         $user = new WP_User;
         $user->init( $userdata );
 
+        wp_cache_set( $userdata->ID, $user, 'users' );
         return $user;
 }
 endif;

wp-includes/query.php

@@ -2651 +2651 @@
                                 $this->found_posts = $this->max_num_pages = 0;
                                 $this->posts = array();
                         }
+
+                        if ( isset( $this->query_vars['update_author_cache'] ) && ( $this->query_vars['update_author_cache'] ) ) {
+                                $authors = array_unique( wp_list_pluck( $this->posts, 'post_author' ) );
+                                _prime_user_cache( $authors );
+                        }
+
                 } else {
                         $this->posts = $wpdb->get_results( $this->request );
                         $this->set_found_posts( $q, $limits );