Ticket #58001: 58001-lazyload-user-capabilities.diff

Index: src/wp-includes/class-wp-user.php
===================================================================
--- src/wp-includes/class-wp-user.php   (revision 60000)
+++ src/wp-includes/class-wp-user.php   (working copy)
@@
        public function for_site( $site_id = '' ) {
-               $this->caps   = array();
-               $this->cap_key = '';
-
-               $this->get_role_caps();
+               $this->caps    = array();
+               $this->cap_key = '';
+
+               // Delay loading role caps until actually needed.
+               $this->caps_lazy_loaded = false;
+       }
+
+       /**
+        * Lazily load capability data for the user.
+        *
+        * @since 6.9.0
+        */
+       protected function lazy_load_caps() {
+               if ( ! empty( $this->caps_lazy_loaded ) ) {
+                       return;
+               }
+               $this->get_role_caps();
+               $this->caps_lazy_loaded = true;
        }
 
        /**
         * Sets the site to operate on. Defaults to the current site.
         *
         * @since 3.0.0
         *
         * @param int $site_id Site ID to operate on. Defaults to the current site.
         */
        public function set_site_id( $site_id = '' ) {
                $this->site_id = $site_id ? absint( $site_id ) : get_current_blog_id();
        }
 
        /**
         * Returns whether the current user has the specified capability.
         *
         * @since 2.0.0
         *
         * @param string $cap      Capability name.
         * @param mixed  ...$args  Optional further parameters, typically starting with an object ID.
         * @return bool Whether the current user has the given capability.
         */
        public function has_cap( $cap, ...$args ) {
+               // Ensure capabilities are loaded before checking.
+               if ( empty( $this->caps_lazy_loaded ) ) {
+                       $this->lazy_load_caps();
+               }
                $args = array_merge( array( $cap ), $args );
                $caps = call_user_func_array( 'map_meta_cap', array_merge( array( $cap, $this->ID ), $args ) );
 
                // Must have ALL requested caps.
                foreach ( $caps as $capability ) {
                        if ( empty( $this->allcaps[ $capability ] ) ) {
                                return false;
                        }
                }
 
                return true;
        }