GTmetrix Swift’s js

I am constantly running Gtmetrix and I see in the waterfall tab that Swift’s js slows down my website. If you follow the GTmetrix link and navigate to the “waterfall” you will see this: “https://mywebsite.com/wp-content/cache/swift-performance/ikistikes.gr/js/93f8f22268ee91a291bfe9e0821698f8.js”

The link to my website can be found in the attached GTmetrix report.

How can I fix it?

Thanks

The page I need help with: [log in to see the link]