delinea
Try to contact the provider of that plugin for help.
With the performance of a site, here are my suggestions:
- Remove any extensions (plugins / modules / components...) which you don't use
- Remove un-used content
- Limit using much extensions which connect to social channel sites or which connect to external sites, as sometime the bad connection from your site to that site will affect the performance.
- For compression, you can consider to use an extension which supports optimization like JCH, etc...
- With media (images, video, ...), you can try with a cloud CDN
Regards