Membership 2 loading time

With only Membership 2 activated the site's loading speed is 9.8s
Total Page Size 1.90MB
Requests 78

With all other plugins activated and Membership deactivated, the loading speed is 2.5s
Total Page Size 1.90MB
Requests 84

With no plugins at all site is loading within 3.0s
Total Page Size 1.86MB
Requests 78

Please advise