The latest version of this plugin, combined with the latest version of wordpress causes the entire website to slow down. As soon as i disable this plugin both back end and front end are almost 5 x faster.
We and other users do not have this problem. Perhaps the plugin conflicts with another plugin on your site? How did you determine the speed of the site?
without plugin enable, clicking around website in back end takes 1 second or less to move between pages/links. When activate plugin, clicks take 2 to 3 seconds.