Bicknell Digital

Convert to AVIF and Optimise automatically converts media library images to AVIF, stripping metadata, keeping your original uploads alongside the new files and updating all of your content to reference the optimised versions. The plugin keeps featured images, site logos, page builders, widgets and other stored URLs aligned with the converted image paths.
<h4>Key features</h4>
<ul>
<li>Automatic optimisation of newly uploaded JPEG, PNG and WebP files into AVIF.</li>
<li>Bulk optimisation tool that updates every post, page, featured image and option referencing your media.</li>
<li>Adjustable quality target so you can choose the balance between fidelity and file size.</li>
<li>Optional metadata stripping and original files retained beside the AVIF copies to keep your workflow flexible.</li>
<li>British English interface copy to keep everything consistent for UK sites.</li>
</ul>

Convert to AVIF and Optimise

Convert and optimise your WordPress media library to AVIF while keeping every reference to your images in sync.

Daryll Doyle

This plugin enables Parallelized Downloads / Domain Sharding for your WordPress images.
This is a good alternative if you don’t want to pay for a CDN but have an image heavy site.
Domain sharding is a technique used to increase the amount of simultaneously downloaded resources for a particular website by using multiple domains. 
This allows websites to be delivered faster to users as they do not have to wait for the previous set of resources to be downloaded before beginning the next set.
This plugin is only useful if you have an image heavy site. For sites with very few images you may see an increase in load times with this plugin due to increased numbers of DNS lookups.
See <a href="https://www.keycdn.com/support/domain-sharding/" rel="nofollow ugc">here</a> for more information on Domain Sharding

Parallelize Downloads

Enable Parallelized Downloads / Domain Sharding for your WordPress images.

Convert to AVIF and Optimise vs Parallelize Downloads