The features include Optimize JS code. What is the difference of this to the Magento 2 default Optimize JS?

The features include Optimize JS code. What is the difference of this to the Magento 2 default Optimize JS?

In Magento, JS bundling option bundles all JS files into several files of the same size.  In this case, all the files will be loaded at once, disregarding which one is required for the specific page. The bundling algorithm of the Google Page Speed Optimizer combines all JS files into bundles. Each bundle serves a page, so at the moment of page loading, the extension fetches the required bundle instead of loading all the files.