Thanks for the review!
There are different types of metrics.
Loading the plugin itself draws only very few resources on the server.
The plugin loads its Pixel Manager library and third-party tracking libraries on the front end. Performance metrics tools typically flag those third-party tracking libraries (Google, Facebook, etc.). But, there is not much you can do, no matter which tracking code manager you use. They all need to load the same tracking libraries.
The Pixel Manager’s library is smaller than the manager libraries from other tracking code managers. That’s a plus.
And, if you want to afford the pro version of the Pixel Manager, you can use the Lazy Load feature, which only loads the tracking libraries after a visitor interacts with the website. This can bring significant performance improvements in performance metrics tools: https://sweetcode.com/docs/wpm/plugin-configuration/general-settings#lazy-load-the-pixel-manager
