Request management to handle sessions
Creating a session causes four request to session backend (at least for SQL session backend, but I guess it behave the same with any backend), one insert request and three update,
- the first one to add "_session_kind" => "SSO",
- the second one to add session data
- the third one to add "updateTime" and "_issuerDB" Till version 1.3, it was done with two requests, one insert and one update. And it could be done with one single request.
As same, logout causes three select requests to read user session, whereas a single request is enough.