This plug in will slow your server to halt. I'm talking about the PRO version. I wasted hours and moved to a new server just to discover that THIS plugin is the culprit.
Apache, Nginx, and Apache+Nginx, http2 but still my website was slow. This is a single wordpress installation on 50GB Mem. SSD but nothing worked. and as soon as I disabled it, everything was lighting fast (almost) It's a fraction of a second behind facebook page loading speed.
With the plugin it could take 15 seconds and sometimes more to load a single page. The amount of time I wasted was huge.
If you had a major plugin like Peepso on your site then this is the reason why it's slow. It looked nice but in practice it's harmful to your online business.