WooCommerce

Many sites face a situation where regular pages, posts, catalog pages load quickly, and product pages load more slowly. A bunch of optimizations, caching does not help much.

Any product blocks have a very strong influence on this, especially if for marketing you need to display more than 10 products in a block (it can be 20+ in one block and in another).

Comparing the product page without them and with them, you can see a noticeable difference in the speed of loading the product page. The situation is also similar when using Gutenberg product blocks.

Therefore, it is advisable to implement the ability in the plugin settings to enable loading of product blocks (upsells, related, cross sells, as well as Gutenberg product blocks) using Ajax.