Umm... Well, you obviously can’t cache POST actions but you usually can cache a lot of the stuff in the response. The cache system in Drupal 8 is pretty awesome

Umm... Well, you obviously can’t cache POST actions but you usually can cache a lot of the stuff in the response. The cache system in Drupal 8 is pretty awesome - especially when backed by Memcache or Redis. I’d say it’s quite easy to build slow sites on any platform. I also know it’s very well achievable to build truly perfomant sites on Drupal. Also, with the sites built on top of these CMSs, performance very rarely actually becomes an issue. The number one worry with the sites is their unmaintained codebase and all the security implications that come with it. I really like Drupal 8 and I certainly wouldn’t call it bloated. It’s extremely modular and you can enable just the things you need. What I really want, though, is that people would take better care of the sites they build on it.