AspieSoft

Easily lazy load another page simply by adding a shortcode with its url.
The 2nd page wont load until the user scrolls to the bottom, than an ajax request is sent to get the page content. 
This can help speed up large pages on your site, by not loading the stuff users don’t see until they scroll down closer to the bottom.

AspieSoft Ajax Load Page

Easily lazy load another page simply by adding a shortcode with its url.

calmgracian

Devrama Image Lazyload loads images in the content of your post as you scroll down. It makes the page load faster and reduce server traffic. 
Here, you can check how it load images in the page. 
http://devrama.com/static/devrama-lazyload/example-document.php

Devrama Image Lazyload

Devrama Image Lazyload loads images in the content of your post as you scroll down. It makes the page load faster and reduce server traffic.

AspieSoft Ajax Load Page vs Devrama Image Lazyload