Hi @veene,
Sorry to hear you’re not happy with your websites performance after installing and using Site Kit. Note that you are also correct, adding services to your site, whether via Site Kit or manually, can have a trade off with performance. Any network requests or code added to the front end of your site, are service network requests, and the same code snippets if you were to add these services manually. Site Kit doesn’t add any performance impacting code, or make any network requests from the front end of a users site, other than the service level code and requests.
We have more information on this to the plugin website. For clarity we’ve also added the code snippets Site Kit ads to a users website here. You’ll notice that if not using Site Kit the same code snippets would be applied if adding Google Analytis, AdSense or Tag Manager manually.
but it has caused the following errors and a decrease in page load speed score: unused javascript
If you’re using any JavaScript external resource or library, in your case Google Analytics, there will be part of the Google Analytics JavaScript resource not executed. This is normal, and it’s only a notice to inform users, not a warning. You’ll find more on this below:
https://github.com/GoogleChrome/lighthouse/issues/11007
Note also that this doesn’t directly impact your PageSpeed Insights performance score. Almost all sites will have unused JavaScript. Some pages on a particular site may use more of a JavaScript resource than others.
Does the above clear up any of the queries you may have on Site Kit, and how it connects Google services to a users site? Let me know if you have any further queries and I’d be happy to assist. I’m also happy to check your site to ensure the plugin has inserted the snippets correctly if you’d like to share your site URL.
