What speed app and theme does this fast online store use?

[sao]

Hi,I really need and also want to know what speed app does this shop use because is very fast: 

https://cbexclusive.ro/

and also the theme pls

[StephensWorld]

This thread is a duplicate. Answered here: https://community.shopify.com/c/shopify-apps/shopify-themes-apps/td-p/2387808