Still on Drupal 7? Security support for Drupal 7 ended on 5 January 2025. Please visit our Drupal 7 End of Life resources page to review all of your options.
Big pipe is new since drupal 8 and introduces a way to load and render blocks which have a high cache invalidation, or are uncacheable, during the stream of the response.
Treat Permission UI page as Readonly Overview by disabling submit button. Additional permission used as trigger. Active notices on screen header and after disabled submit button.