ASP.NET MVC 5 concurrent requests are queued even with disabled Session

Question

Before thinking about downvoting or telling me \"google it\", please read the problem more carefully. This is old/classic problem but old/classic solution is no longer worki

Answer 1

Concurrent parallel requests worked for me when I decorated my controller with this attribute

[SessionState(System.Web.SessionState.SessionStateBehavior.ReadOnly)]

It works better than the above disabling session state and was added back in MVC 3. More info here