Hello,
Thank you very much for using our theme.
Yes, we see that your website is well optimized and loads very fast. But if the page is not in the cache it may take 2-3 seconds to get a response from the server. Actually, it shouldn’t be a theme issue. We suggest you to disable the cache, and test everything that may affect this: disable extra plugins, enable/disable our theme, or switch to some default one. Also, contact your hosting provider and ask them to check the issue from their side.
Kind Regards