Hello, @iraznatovic,
All of our demos are very well optimized already. Our theme is the most optimized version on the ThemeForest. You can use any shop demo of our theme: https://www.portotheme.com/wordpress/porto_landing/
Please make sure to use a lightspeed server and also make sure that the content that you upload on the site is optimized as well. Further, our theme has a special feature to optimize the site speed without using any plugins. You can check the articles below to understand more:
https://www.portotheme.com/wordpress/porto/documentation/how-to-improve-site-speed/
https://www.portotheme.com/wordpress/porto/documentation/merge-stylesheets-in-a-file/
https://www.portotheme.com/wordpress/porto/documentation/critical-css/
https://www.portotheme.com/wordpress/porto/documentation/faq/how-to-compile-shortcodes-css/
https://www.portotheme.com/wordpress/porto/documentation/w3-total-cache/
We hope this information helps.
Best Regards,
PThemes Team.
