Software developer can disable session state management using option “Off”. This can provide a slight performance improvement for websites that are not using session state: 
<?xml version=”1.0” encoding=”utf-8” ?> <configuration>      <system.web>      <!— other settings are omitted. —>      <sessionState         cookieless=”AutoDetect” cookieName=”ASP.NET_SessionID”         regenerateExpiredSessionID=”false”         timeout=”20”         mode=”Off”         stateConnectionString=”tcpip=127.0.0.1:42424”         stateNetworkTimeout=”10”         sqlConnectionString=”data source=127.0.0.1;Integrated Security=SSPI”         sqlCommandTimeout=”30” allowCustomSqlDatabase=”false”         customProvider=””      />      </system.web> </configuration>