BURGA review for Klaviyo: Email Marketing & SMS

This app is well marketed, and go to tool for e-commerce email marketing. However be cautious that installing klaviyo shopify app and inserting their .JS to your store it takes 15 website speed points out of 100 possible speed points. Our developer pointed this out that klaviyo app inserts a ton of not needed stuff to the site that kills the speed performance score of the site. WE ran a test where we removed their .JS from our store and our google speed insights score went from 20 to 35... Klaviyo please fix this