I have been working with Ubuntu for a year or so.
Just the other week I have started to learn the Symfony framework which works faster with the ACL.
In the installation and configuration of Symfony ( http://symfony.com/doc/current/book/installation.html#configuration-and-setup ) the permissions section offer two ways to set up the permissions, using setfacl or chmod +a.
It seems Ubuntu supports setfacl instead of chmod +a.
My question; is one better than the other here? ie is one more efficient