Membership Plugin is slowing down site

Hi,

I am using the Membership Plugin and it is slowing down my site considerably to the point where I may not be able to use it.

url: http://tinyurl.com/lxtd849

I performed a test with P3 (Plugin Performance Profiler) to confirm. Here are two snapshots from P3 profiler: https://db.tt/q5hn6p4k

Is there anything that can be done to fix this? I hope so. The features of the plugin are exactly what I need.