[Monarobase]

By using the PHP_LSAPI_CHILDREN method, only a single APC shared memory slice will be created and shared by all children.

Does this mean that multiple children are allowed but all run from the root user so APC stores can communicate between each other ?

Does XCache have an object cache like APC ? If so would it be secured between users ?

Lots of scripts are compatible with APC, I'm not sure how many can nativly use Xcache object caching