Ticket #62126: cache-wp-theme-json-sanitize-input.diff

wp-includes/class-wp-theme-json.php

@@ -938 +938 @@
          * @return array The sanitized output.
          */
         protected static function sanitize( $input, $valid_block_names, $valid_element_names, $valid_variations ) {
+                static $input_cache = array();
+
+                $input_cache_key = md5( wp_json_encode( $input ) );
+                if ( isset( $input_cache[ $input_cache_key ] ) ) {
+                        return $input_cache[ $input_cache_key ];
+                }
 
                 $output = array();
 
@@ -1058 +1064 @@
                         }
                 }
 
+                $input_cache[ $input_cache_key ] = $output;
                 return $output;
         }