How do I empty Drupal Cache (without Devel)

Question

How do I empty the Drupal caches:

• without the Devel module
• without running some PHP Statement in a new node etc.
• without going i

Answer 1

In Drupal 8, the admin menu module isn't quite ready for use yet. And it will probably get replaced with Drupal "Toolbar". So right now there's no easy way to clear cache, without actually going to:

admin/config/development/performance

The only alternative is to add a menu item in the existing toolbar. This can be done by using this module, but as you can see, it still needs a bit of work. I got it working, but had to make a few tweaks.