Idiom

<p>Rather than having your users download a new page each time they click to view older posts, speed up your website by dynamically loading those posts on the same page using ajax. With minimal editing to your theme files, Easy Load More will add a button for ajax content loading. Works automatically on your front page, any taxonomy or custom post type page, any archive page, and search pages without special configuration.</p>
<p>Easy Load More has a light footprint that won’t slow your website down. Buttons are lightly styled that won’t override or interfere with your theme styles. The required javascript is tiny at only 766 bytes. Animated loading icons are rendered with SVG so your users don’t have to download images. Finally advanced theme developers can optionally turn off plugin styles and javascript to bundle it with theme files, reduce HTTP requests that increase page load time, and completely customize the look and feel of the loading buttons.</p>


Easy Load More

Add a "Load More" button to dynamically add posts without pagination and page loads.

Processby

<p>Loading paged content with Ajax. Works with standard WordPress pagination, WooCommerce pagination, plugins.<br />
<a href="https://processby.com/blog/" rel="nofollow ugc">Plugin demo</a></p>
<h4>Features</h4>
<ul>
<li>Ajax pagination;</li>
<li>“Load more” button;</li>
<li>“Load more” button and pagination;</li>
<li>Infinite Scroll;</li>
<li>Customisable styles.</li>
</ul>


WP Ajax Load More Pagination and Infinite Scroll

It is a great plugin. So much easy to use. It is also light. It saved me from hours of works. 
Thanks to the author. 
I hope author will keep it up to date and won't add unnecessary codes in the future.

Easy Load More vs WP Ajax Load More Pagination and Infinite Scroll