Ticket #20875: 20875-update_meta_cache.diff

src/wp-includes/meta.php

@@ -830 +830 @@
                 $object_ids = explode( ',', $object_ids );
         }
 
-        $object_ids = array_map( 'intval', $object_ids );
-
-        $cache_key = $meta_type . '_meta';
-        $ids       = array();
-        $cache     = array();
-        foreach ( $object_ids as $id ) {
-                $cached_object = wp_cache_get( $id, $cache_key );
-                if ( false === $cached_object ) {
+        $object_ids   = array_map( 'intval', $object_ids );
+        $group        = $meta_type . '_meta';
+        $ids          = array();
+        $cache        = array();
+        $groups       = array( $group => $object_ids );
+        $cache_values = wp_cache_get_multiple( $groups );
+        foreach ( $cache_values[ $group ] as $id => $value ) {
+                if ( false === $value ) {
                         $ids[] = $id;
                 } else {
-                        $cache[ $id ] = $cached_object;
+                        $cache[ $id ] = $value;
                 }
         }
 
@@ -876 +876 @@
                 if ( ! isset( $cache[ $id ] ) ) {
                         $cache[ $id ] = array();
                 }
-                wp_cache_add( $id, $cache[ $id ], $cache_key );
+                wp_cache_add( $id, $cache[ $id ], $group );
         }
 
         return $cache;