Cache

This article is work in progress to help Drupal developers finding out, why a page is not cached in many situations. It can help as a checklist. I'll add further information in the future, possibly. Typical reasons for pages not being

You're using Call-to-action forms, for example great Webforms on many Drupal 8+ (9 / 10 / ...) pages and you're wondering why your pages are slow and eventually not cached? While placing CTA-forms on pages can be a very good idea for