Mike Bricknell-Barlow

This plugin helps to increase site speed, and helps to improve scores in Google’s Pagespeed Insights tool by addressing the common recommendation “Serve next-gen image formats”.
For the best speeds, Google recommends using new image formats such as .webp, which offer smaller file sizes than common formats such as .jpg or .png with no visible loss in quality. However, not all internet browsers support the .wepb image format, so only using that format would result in broken images in older browsers.
This plugin addresses that problem, and allows your site to use .webp images when it can. This plugin will convert images from .jpg or .png automatically, and save .webp versions of the image alongside the original. When a user visits the site in a compatible browser, they will be shown the .webp versions of all images, making your site load faster and improving your scores in Google Pagespeed Insights. Users on older browsers that aren’t compatible with .webp images will be shown the .jpg or .png versions of the images instead.
When first installing the plugin, run the Bulk Converter to convert all your existing images. See the Installation section for instructions.
After installation, any .jpg or .png image uploaded to the Media Library will be automatically converted.
<h3>Settings</h3>
<ul>
<li>
Conversion quality – Controls the level of compression on the generated .webp images. The lower the value, the smaller the file size of the generated images, but the more chance there is of a visual degradation of quality. The quality value to be entered is a percentage – by default, this is set at 80%. Most users won’t need to change this.
</li>
<li>
HTML Output Buffering – This allows the plugin to perform a find-and-replace on the HTML that WordPress has generated for output to the browser to replace image tags. This tends to perform the image tag replacement more reliably, but can cause issues with some themes. Users are advised to have this setting turned on, but they should check that the site is displaying as it should, and turn this option off if any issues arise.
</li>
<li>
Exclude pages from HTML output buffering – To specify pages that should be excluded from the HTML Output Buffering settings
</li>
<li>
Lazy loading – This improves the site speed further by not loading images that are further down the page until the user has scrolled down to them. This saves time downloading images that the user hasn’t got to yet, or might not get to at all. Users are advised to have this setting turned on, but they should check that the site is displaying as it should, and turn this option off if any issues arise.
</li>
<li>
Exclude image classes from lazy-loading – To specify images, by class name, that should not have the lazy-loading applied
</li>
</ul>
<h3>Developers</h3>
If using Simple Webp Images with your custom themes or plugins, there’s a couple of filters you can use, as below.
<ul>
<li><code>simple-webp-images-exclude-from-output-buffering</code> filter</li>
</ul>
Use this to exclude pages or posts from the HTML output buffering via <code>apply_filters</code>, using any critera you need. Call the filter, run any checks you need, and return ‘true’ to exclude the current page or post from the buffering. 
Example:
<pre><code>apply_filters( 'simple-webp-images-exclude-from-output-buffering', 'exclude_page_with_id_100_from_output_buffering' );
function exclude_page_with_id_100_from_output_buffering( $is_excluded ) {
 if( get_the_id() == 100 ) {
 return true;
 }

 return false;
}
</code></pre>
The example code could be placed in your <code>functions.php</code> file.
<ul>
<li><code>simple-webp-images-exclude-from-lazy-loading</code> filter</li>
</ul>
Use this to exclude pages or posts from the image lazy loading via <code>apply_filters</code>, using any critera you need. Call the filter, run any checks you need, and return ‘true’ to exclude the current page or post from the lazy loading. 
Example:
<pre><code>apply_filters( 'simple-webp-images-exclude-from-lazy-loading', 'exclude_page_with_id_100_from_lazy_loading' );
function exclude_page_with_id_100_from_lazy_loading( $is_excluded ) {
 if( get_the_id() == 100 ) {
 return true;
 }

 return false;
}
</code></pre>
The example code could be placed in your <code>functions.php</code> file.

Simple Webp Images

Generates webp images from uploaded images, and outputs webp images in content in compatible browsers. Optionally provides lazy-load functionality.

Preexist Kudos

Aruba Support

Aruba.it

Aruba.it Dev

Leandro Perez

Andrea Gelmini

Aruba HiSpeed Cache is a plugin that interfaces directly with the HiSpeed Cache service for an <a href="https://www.aruba.it/en/" rel="nofollow ugc">Aruba</a> <a href="https://hosting.aruba.it/en/" rel="nofollow ugc">hosting platform</a> and automates its management in the WordPress dashboard, without having to access the website’s control panel.
The plugin can only be used if your WordPress website is hosted on an <a href="https://www.aruba.it/en/" rel="nofollow ugc">Aruba</a> <a href="https://hosting.aruba.it/en/" rel="nofollow ugc">hosting platform</a>.
The HiSpeed Cache service significantly reduces the TTFB (first Byte transfer time) and webpage loading times.
When the service is active, the plugin lets you clear the cache automatically (and/or manually) every time a page or post is edited, without having to access the control panel for the website by clicking on the link provided.
HiSpeed Cache keeps dynamic content in the servers’ memory after the first time it loads, making it available for subsequent requests much faster, significantly speeding up website browsing. The plugin simply clears the cache every time a custom page, article or content item is edited.
For more details and to find out whether the HiSpeed Cache service is active on your website <a href="https://guide.hosting.aruba.it/hosting/wordpress-e-altri-cms/wordpress-plugin-aruba-hispeed-cache.aspx?viewmode=0#eng" rel="nofollow ugc">please refer to our guide</a>.

Aruba HiSpeed Cache

Aruba HiSpeed Cache interfaces directly with an Aruba hosting platform's HiSpeed Cache service and automates its management.

Simple Webp Images vs Aruba HiSpeed Cache