Have two more questions
1. Could you add this as option to theme setup? Just because this is impossible to setup in child theme and after update the changes will be lost.
2. Where to change the code if I would like to apply to blog posts too? It seems that it doesn’t appear on blog category although the post template should be the same.
Lets have a look and see the difference on performance of first and second image
Thax a lot. Soul