Membership 2 Pro very slow performance when plugin activated

Greetings,

I recall this occurring with the Protected Content plugin, and at one point there was a patch that fixed the issue.

When the Membership 2 Pro plugin is activated on a site, all operations on the front-end and back-end, including admin, are VERY slow. Other sites in the MU Network are not affected. Just the site on which the plugin is activated. If I deactivate the plugin, the performance is great.