mijnsmaak Hi there,
When your site is running through Ezoic's proxy we handle HTML compression by default. I see that you are not currently using Leap, may I ask why?
For best performance, you would want to integrate your site via name servers or via Cloudflare - more info on how to do that here.
You can use Ezoic as a server side technology to clean up your site and make the ads and content fast. You do this by connecting to Ezoic via name servers or Cloudflare and then connecting to Ezoic Ad Tester and Leap. Because Ezoic is a real CDN, the system can actually cache the HTML pages in our edge servers.
If you use Leap - you are definitely going to see better performance vs nitropack but it might take you a little while to get all the settings right, but I can assure you, it works so much better than any WP plugin (including nitropack).
If you choose to keep using the plugin integration method, you won't have full access to the LEAP functionality, and will most likely be a headache as you would need to disable certain features of the Nitropack plugin to get things working properly. Switching to cloud integration method would be the first step to cleaning things up and making this a simpler fix for you!
I hope that helps!