Hello,

To find out which plugin makes your website slow you can enable them one by one and test the performance after each step. But as you can see, our theme doesn’t make performance issues on your website.
Note that you need to keep swatches disabled on the shop page. They may impact the loading time on the first page load. It happens because of large number of variations. After first loading, this information is cached and next loading will be faster.

Kind Regards