I found this on reddit while trying to speed up my website. Basically, GA4 defaults to setting up tags for data collection that a lot of people might not need (downloading files, streaming videos, etc). Some of you may need to keep these settings, but if you don't your site will load a little faster.
Credit: Reddit Post
If you already set up the analytics:
Google analytics will now not take as much resources to load because it's loading 60% less scripts to monitor things you don't have on your site. Place your analytics tag at the bottom of your page right above the closing body tag.
Enjoy your new page speed gains :)
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