mabujo

Featured Image Sharpen Up makes a tiny version of your featured post image and places it in the head of the page. 
As you scroll down the page, some JavaScript lazy loads the featured images in the background and replaces the tiny images as the full images are loaded.
You may have seen a similar effect used for images on medium.com.
Created on WordPress 4.4, but should work on earlier versions. 
Tested working on all Twenty Sixteen, Twenty Fifteen, Twenty Fourteen, Twenty Thirteen, Twenty Twelve and Twenty Eleven themes. Should work on other themes, but may need CSS adjustments, depending on theme handling of featured images.
Uses jQuery.Lazy(); (http://jquery.eisbehr.de/lazy/) and Hugh Lashbrooke’s plugin template (https://github.com/hlashbrooke/WordPress-Plugin-Template)
Plugin page : <a href="https://mabujo.com/blog/featured-image-sharpen-up-wordpress-plugin/" rel="nofollow ugc">Featured Image Sharpen Up plugin @ mabujo</a>

Featured Image Sharpen Up

This plugin helps increase the page loading speed of your site by replacing featured post images with a small inline image, and lazy loading the full  …

abhishekgr

RabbitLoader

<h4>🚀 Load Your Pages Faster & Rank Higher</h4>
RabbitLoader is an AI-powered performance enhancement plugin that makes your WordPress website load in milliseconds and achieve the elusive green score (90+) on PageSpeed Insights — for every page, not just your homepage.
Unlike traditional plugins that require constant tweaking, RabbitLoader analyzes every asset on your pages — CSS, JS, images, and fonts — and applies the right optimizations automatically. 
The result: faster pages, smoother experiences, and less time spent on manual performance tuning.
Built and tested with all major WordPress themes and builders (including Elementor, Divi, and others) — so you get the speed without the stress.
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/W-jYelvWE0I?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>
👉 <a href="https://rabbitloader.com/wordpress-crash-course/" title="PageSpeed optimization crash course videos" rel="nofollow ugc">Watch bite size tutorial videos</a>
<h4>💡 How RabbitLoader Improves SEO & User Experience</h4>
RabbitLoader’s AI optimizations directly improve how people interact with your site — and the results are backed by real data:
<ul>
<li>Faster Loads – Pages load in under 1 second, reducing bounce rate by up to 50%. </li>
<li>Stable Visual Layouts – Critical CSS prevents shifts; stable pages see 24% higher engagement. </li>
<li>Higher PSI Scores – Hit 90+ on PageSpeed Insights for all pages with one plugin. </li>
<li>Pass Core Web Vitals – Tuned for perfect LCP, CLS, and INP. Passing sites are 24% less likely to lose rankings. </li>
<li>SEO & Conversion Gains – A 1s improvement can boost conversions by 7%. </li>
<li>More WooCommerce Sales – Optimized product and checkout pages can increase sales by 15–30%. </li>
</ul>
👉 With RabbitLoader, you’re not just improving speed — you’re optimizing for engagement, rankings, and conversions.
<h4>🔄 What RabbitLoader Replaces (All-in-One vs Many)</h4>
Most sites rely on 5–6 different tools: one for caching, one for images, one for CSS/JS, plus a CDN plugin. That means: 
❌ Too many plugins to manage 
❌ Higher conflict risk 
❌ Extra cost and wasted time
RabbitLoader replaces them all:
<ul>
<li>Image Optimization – WebP/AVIF conversion, resizing, lazy-load. </li>
<li>Critical CSS Generation – Per-page Critical CSS for faster first paint. </li>
<li>Smart JS Deferral – Improves responsiveness without breaking layouts. </li>
<li>Global CDN with Edge Caching – Worldwide low-latency delivery. </li>
<li>Lazy Loading – Images and iframes load only when needed. </li>
<li>Minification & Compression – HTML/CSS/JS minified with Brotli/Gzip. </li>
<li>PageSpeed Monitoring – Built-in and included. </li>
</ul>
👉 One Plugin. Less Hassle. More Speed.
<h4>⚙️ Why Agencies & Developers Love RabbitLoader</h4>
RabbitLoader is built for professionals who want speed and reliability without maintenance headaches:
<ul>
<li>Safe Defaults – No broken layouts or long troubleshooting. </li>
<li>Automation – AI handles optimization, saving hours per site. </li>
<li>Easy Control – Exclude or roll back any page instantly. </li>
<li>Staging-Friendly – Test updates safely before going live. </li>
<li>Multisite Ready – Manage multiple sites with per-site control. </li>
<li>Client Reports – Show improvements with transparent metrics. </li>
</ul>
<h4>⚡ How It Works</h4>
<ol>
<li>Install and activate RabbitLoader. </li>
<li>Click Connect (free plan available). </li>
<li>RabbitLoader automatically generates Critical CSS, optimizes assets, and warms the cache. </li>
<li>Check your PageSpeed Insights or Core Web Vitals — improvements appear within minutes. </li>
</ol>
👉 <a href="https://youtu.be/W-jYelvWE0I" rel="nofollow ugc">Watch Tutorial on YouTube</a>
<h4>🧩 Tested With Popular Hosts, Builders & Setups</h4>
RabbitLoader has been tested and verified with a wide range of themes, plugins, and hosting providers.
E-commerce 
– WooCommerce (safe checkout & cart handling)
Page Builders 
– Elementor, Divi, Bricks, Beaver Builder, Gutenberg
Popular Plugins 
– WPForms, Contact Form 7, Formidable Forms 
– Yoast SEO, All-in-One SEO, Rank Math 
– Slider Revolution, OptinMonster, LiveChat 
– BuddyPress, bbPress, Ultimate Blocks 
– Weglot, HubSpot, Akismet, YARPP 
– RafflePress, Shoplentor, Borderless 
– And more…
Themes 
– Astra, OceanWP, GeneratePress, Storefront 
– Divi, Hello Elementor, Blocksy, Kadence 
– Neve, Hestia, Sydney, Botiga, ColorMag 
– PopularFX, and other leading WordPress themes
Hosting Providers 
– WP Engine, SiteGround, Kinsta, Hostinger 
– Bluehost, GoDaddy, HostGator, Namecheap 
– AWS, DigitalOcean, Hetzner, IONOS, OVHcloud 
– Liquid Web, and most managed WordPress hosts
Server Types 
– LiteSpeed / OpenLiteSpeed 
– Nginx 
– Apache
CDN & Proxy Layers 
– Cloudflare (tested with Automatic Platform Optimization)
👉 If your site runs WordPress, RabbitLoader works with it.

RabbitLoader – AI Speed Optimization, Caching & CDN for WordPress & WooCommerce


I used RabbitLoader for WordPress to optimize my website and it exceeded my expectations. Installation and setup were easy, and it significantly improved loading speed and performance. 



Highly recommended!


Fantastic Plugin for WordPress Website Optimization


It works perfect.



It creates like a cdn for all your content and assets.



This cache really works perfect.



I passed from F to A only installing this plugin


Amazing, the best cache plugin


Integrates well with WordPress sites and is easy to configure. The performance improvement is impressive.


Wonderful application

All-in-one AI speed optimization plugin for WordPress & WooCommerce websites. Get faster loading pages and near-perfect PageSpeed scores — in just …

Featured Image Sharpen Up vs RabbitLoader – AI Speed Optimization, Caching & CDN for WordPress & WooCommerce