Hello,

This plugin slows down your website depending on the number of images per page. It is not related either to Elementor or our theme. Obviously, when the Elementor is disabled, there are no product images displayed on the home page. Also, our theme has product galleries and hover images so each product adds multiple images and make it even slower. If you test Storefront with 30-50 products per page (= 50 images), it will be slower too. Here are screenshots

https://gyazo.com/cc351de1500fba96984ec4f068357806\
https://gyazo.com/44966764b0600e6615086e2d444f6d69