Ticket #26937: 26937.2.diff

wp-includes/link-template.php

@@ -1291 +1291 @@
 
                 // Build our arguments for WP_Query.
                 $query_args = array(
-                        'posts_per_page'   => 1,
-                        'post_status'      => 'publish',
-                        'post_type'        => 'post',
-                        'orderby'          => 'date',
-                        'order'            => 'previous' === $this->adjacent ? 'DESC' : 'ASC',
-                        'no_found_rows'    => true,
-                        'cache_results'    => true,
-                        'date_query'       => array(),
+                        'posts_per_page'      => 1,
+                        'post_status'         => 'publish',
+                        'post_type'           => 'post',
+                        'orderby'             => 'date',
+                        'order'               => 'previous' === $this->adjacent ? 'DESC' : 'ASC',
+                        'ignore_sticky_posts' => true,
+                        'date_query'          => array(),
+
+                        // Performance considerations:
+                        'no_found_rows'          => true,
+                        'cache_results'          => true,
+                        'update_post_term_cache' => false,
+                        'update_post_meta_cache' => false,
+                        'split_the_query'        => wp_using_ext_object_cache(),
                 );
 
                 $tax_query = array();

wp-includes/load.php

@@ -375 +375 @@
         $current_using = $_wp_using_ext_object_cache;
         if ( null !== $using )
                 $_wp_using_ext_object_cache = $using;
-        return $current_using;
+        return (bool) $current_using;
 }
 
 /**

wp-includes/query.php

@@ -3221 +3221 @@
                 }
 
                 $split_the_query = ( $old_request == $this->request && "$wpdb->posts.*" == $fields && !empty( $limits ) && $q['posts_per_page'] < 500 );
+                if ( $split_the_query && isset( $q['split_the_query'] ) && empty( $q['split_the_query'] ) ) {
+                        $split_the_query = false;
+                }
 
                 /**
                  * Filter whether to split the query.