vincbeck opened a new pull request, #36871:
URL: https://github.com/apache/airflow/pull/36871

   Currently the menu in Airflow UI is using the filter 
[is_menu_visible](https://github.com/dpgaspar/Flask-AppBuilder/blob/master/flask_appbuilder/filters.py#L133)
 to display or not each menu item. Each call to `is_menu_visible` calls 
[has_access](https://github.com/apache/airflow/blob/main/airflow/www/security_manager.py#L124)
 which then call an `is_authorized_` method from the auth manager used in the 
environment. Most likely, all auth managers (with the exception of fab) will 
call an external service for every `is_authorized_` method. Today, displaying 
the menu call 26 times an `is_authorized_` method which can be very expensive 
and make the Airflow UI slower.
   
   Introducing `get_permitted_menu_items` which is responsible of returning the 
menu given user permissions can replace these 26 calls to one (if the service 
used by the auth manager is capable of multiple authz requests in one API).
   
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