How to improve performance and loading time?
To improve performance of Variation Swatches for WooCommerce Navigate to WordPress admin menu WooCommerce =>Settings =>Product Swatches=> Tools
Performance: To clear current cache click Clear all cache
Load Script: Check check to load plugin script only single product page or shop page only in uncheck then script load all pages
Defer Load JS: Check it to improve the PageSpeed score
Use Cache: This is most important to improve the load time of your site if you have huge no of variation then enable this cache.