Danila Vershinin

Cacheability improves your website loading time by making it a well-behaved HTTP citizen.
<h3>Plugin Features</h3>
<h4>Conditional HTTP GET</h4>
Cacheability adds conditional HTTP GET feature for WordPress posts. A repeat request to a post which wasn’t modified, will result in a 304 HTTP response. It quickly tells the browser: “nothing new here” without sending the whole post all over again. This saves the bandwidth and increases performance on both ends.
<h4>Fixes soft 404 errors</h4>
WordPress emits soft 404s on empty search results or an invalid tag page, e.g., either <code>/?s=foo</code> or <code>/tag/bar</code> will always result in the HTTP 200 status code, irrespective of whether any entries were displayed there. Soft 404s are bad for you! Cacheability eliminates them by setting the proper 404 HTTP status upon empty search results or tags.
This improves your SEO ranking.
<h4>Warming cache for updated content</h4>
Every time you edit a WordPress post, your cache is cleared in many places. The post page is cleared, the homepage is cleared, the category, feeds, etc., etc. You edited just a single post or page, but your cache is cleared in many places!
This is cool because you don’t want stale content on your website. But it’s not cool to make your next visitors face slow pages!
Cacheability automatically warms up the pages which were purged from cache:
<ul>
<li>It warms up purged caches as soon as you edit your content, via cron</li>
<li>It warms up both Gzip and Brotli versions of cleared pages</li>
</ul>
All this allows for more happy visitors that hit your cache, and not slow backend!.
This feature requires <a href="https://wordpress.org/plugins/varnish-http-purge/" rel="ugc">Proxy Cache Purge</a> plugin. 
Also, ensure WordPress cron is configured correctly.

Cacheability

Cacheability improves your website loading time by making it a well-behaved HTTP citizen.

Arya Dhiratara

Think Digital Agency

A drop dead simple and lightweight image, iframe, and video optimization plugin to satisfy Google PageSpeed Insights, Lighthouse, and overall user experience.
This tiny little plugin (around 14kb zipped) will automatically
<ul>
<li>lazyload your below the fold images/iframes/videos,</li>
<li>preload your featured images (should also works well with WooCommerce product featured image),</li>
<li>add loading=”eager” to your featured image and all images that have <code>no-lazy</code> or <code>skip-lazy</code> class.</li>
<li>add missing image dimension to images that doesn’t have width and height attribute</li>
</ul>
<h3>Features</h3>
<ul>
<li>Lazy Load:
<ul>
<li>Images, iframes, and videos.</li>
<li>Inline background images.</li>
<li>CSS background image (simply put <code>lazyload</code> class to the background image container)</li>
</ul>
</li>
<li>Preload Featured Images 
Automatically preloading featured image from common page/post (homepage, pages except homepage, single post, and WooCommerce single product pages)</li>
<li>Add loading=”eager” attribute to to your featured image and all images that have <code>no-lazy</code> or <code>skip-lazy</code> class.</li>
<li>Add missing image dimension to images that doesn’t have width and height attribute [since 1.0.3]</li>
</ul>
Should works well with all page builders and theme builders. This plugin also able to lazy loading WooCommerce images and preloading WooCommerce product featured images.
<h3>Disclaimer</h3>
<ul>
<li>Lazy load feature are using Lazysizes library (around 3kb, gzipped and minified).</li>
<li>This plugin doesn’t add anything to your database since there’s no settings and options. Everything will automatically activated after you activate the plugin.</li>
<li>You can change some default settings using filter.</li>
<li>This plugin is the simplified version of <a href="https://wordpress.org/plugins/optimize-more-images/" rel="ugc">Optimize More! – Images</a>, if you don’t want to use filters and need to control the settings with UI, you can try that plugin instead of this one.</li>
</ul>
<h3>About Lazysizes</h3>
Lazysizes is highly performant lazy load library, written by Alexander Farkas in pure JS with no dependencies.
Taken from lazysize’s github description: 
High performance and SEO friendly lazy loader for images (responsive and normal), iframes and more, that detects any visibility changes triggered through user interaction, CSS or JavaScript without configuration.
<h3>Filters</h3>
Example filter to add extra lazyload exclude list:
<pre><code>add_filter( 'lpam_extra_exclude_list', function($lpam_extra_exclude_list) {
 return array( 
 'my-logo', 'my-hero-img', 'exclude-lazy'
 );
} );
</code></pre>
Example filter to change lazysizes config (Read the <a href="https://github.com/aFarkas/lazysizes/#js-api---options" rel="nofollow ugc">docs</a>):
<pre><code>add_filter( 'lpam_lazysizes_js_before', function($lpam_lazysizes_js_before) {
 return 'window.lazySizesConfig = {
 expand: 500,
 threshold: 500
 };'
} );
</code></pre>
Example filter to change the image sizes for preload featured image:
<pre><code>add_filter( 'lpam_preload_featured_images_image_size', function($image_size, $post) {
 if ( is_singular( 'post' ) ) { return 'large'; }
 elseif ( is_singular( 'product' ) ) { return 'full'; }
 else { return $image_size; }
}, 10, 2 );
</code></pre>
[new since 1.0.2] Example to disable the preload featured image feature in certain page-type:
<pre><code>add_filter('disable_featured_image_preload', function ($disable) {
 if ( is_singular( 'post' ) ) {
 return true;
 }
});
</code></pre>
[new since 1.0.3] Example to disable adding image dimension in certain page-type:
<pre><code>add_filter('disable_img_dimension', function ($disable) {
 if ( is_singular( 'post' ) ) {
 return true;
 }
});
</code></pre>
[new since 1.0.3] Example to disable this plugin completely in certain page using url:
<pre><code>add_filter('lazy_load_excluded_pages', function ($excludedPages) {
 $excludedPages[] = '/page-1';
 $excludedPages[] = '/page-2';
 return $excludedPages;
});
</code></pre>
[new since 1.0.3] Example to disable this plugin completely in certain page using page ID:
<pre><code>add_filter('lazy_load_excluded_page_ids', function ($excludedPageIDs) {
 $excludedPageIDs[] = 3678; // Exclude page with ID 1
 $excludedPageIDs[] = 3615; // Exclude page with ID 2
 return $excludedPageIDs;
});
</code></pre>
[new since 1.0.4] To disable the tag:
<pre><code>add_filter('disable_noscript', '__return_true');
</code></pre>
 
<h3>USEFUL PLUGINS TO OPTIMIZE YOUR SITE’S SPEED:</h3>
<ul>
<li>
<a href="https://wordpress.org/plugins/optimize-more/" rel="ugc">Optimize More!</a>: A Do It Yourself WordPress Optimization Plugin that give you the ability to:
<ul>
<li>
Load CSS Asynchronously – selectively load CSS file(s) asynchronously on selected post/page types.
</li>
<li>
Delay CSS and JS until User Interaction – selectively delay CSS/JS load until user interaction on selected post/page types.
</li>
<li>
Preload Critical CSS, JS, and Font Files – selectively preload critical CSS/JS/Font file(s) on selected post/page types.
</li>
<li>
Remove Unused CSS and JS Files – selectively remove unused CSS/JS file(s) on selected post/page types.
</li>
<li>
Defer JS – selectively defer loading JavaScript file(s) on selected post/page types.
</li>
<li>
Advance Defer JS – hold JavaScripts load until everything else has been loaded. Adapted from the legendary varvy’s defer js method *recommended for defer loading 3rd party scripts like ads, pixels, and trackers
</li>
<li>
Load Gutenberg CSS conditionally
</li>
<li>
Remove Passive Listener Warnings
</li>
<li>and many more</li>
</ul>
</li>
</ul>
<h3>Other USEFUL PLUGIN:</h3>
<ul>
<li>
<a href="https://wordpress.org/plugins/shop-extra/" rel="ugc">Shop Extra</a> – A lightweight plugin to optimize your WooCommerce & Business site that makes you able to:
<ul>
<li>add Floating WhatsApp Chat Widget (can be use without WooCommerce),</li>
<li>add WhatsApp Order Button for WooCommrece,</li>
<li>Hide/Disable WooCommerce Elements,</li>
<li>WooCommerce Strings Translations,</li>
<li>and many more.</li>
</ul>
</li>
<li>
<a href="https://wordpress.org/plugins/animate-on-scroll/" rel="ugc">Animate on Scroll</a> – Animate any Elements on scroll using the popular AOS JS library simply by adding class names. This plugin helps you integrate easily with AOS JS library to add any AOS animations to WordPress. Simply add the desired AOS animation to your element class name with “aos-” prefix and the plugin will add the corresponding aos attribute to the element tag.
</li>
</ul>
<h3>Optimize More!</h3>
Need to optimize more? Try my <a href="https://thinkdigital.co.id/services/speed-optimization/" rel="nofollow ugc">WordPress Page Speed Optimization’s Service</a>.

Lazyload, Preload, and More!

A drop dead simple and lightweight image, iframe, and video optimization plugin to satisfy Google PageSpeed Insights and Core Web Vitals.

Cacheability vs Lazyload, Preload, and More!