So ...

As I said, many popular blogs and news sites are using lazy load to hide comments on their posts. The most common solution: the user needs to click a "Load Comments" button in order to view the existing comments.

Once again, we need a handy plugin. It's a very small (26 KB) plugin called Lazy Load for Comments.

Here it is:

https://wordpress.org/plugins/lazy-load-for-comments/

So let's see the usual speed tests ...

Here are my results before installing the plugin ...

... and the result after installing and activating the plugin:

Which means an additional 0.002 second ... Basically, the plugin doesn't exist ...

With that having said, let's see how it works ...