To have optimal performance Koala Framework has a few caches.
To clear the complete cache execute:
php bootstrap.php clear-cache
As this is inconvenient during development there is also a script that watches all files that get cached and clear that relevant cache automatically. To start that execute:
php bootstrap.php clear-cache-watcher
(only works on linux with inotify, inotifywait application is required, also memcache is required)