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VN Speed Optimizer is a comprehensive performance optimization suite designed for high-performance websites worldwide. While it includes specialized routing optimization for challenging network regions (like Vietnam), it delivers lightning-fast speed for any WordPress site globally.
<h4>Core Features</h4>
<ul>
<li>Static HTML Cache – Lightning-fast page delivery with intelligent cache management.</li>
<li>Smart Cleanup – Removes bloat (Emojis, Embeds, Dashicons) and optimizes Heartbeat API.</li>
<li>Social Boost – Optimized delivery for Facebook, TikTok, and Zalo traffic.</li>
<li>Community CDN (Beta) – Join the community network to accelerate content delivery.</li>
<li>Instant Touch – Preloads pages on hover for instant navigation.</li>
<li>Smart SEO & Schema – Auto-generated JSON-LD and Crawl Control to save crawl budget.</li>
<li>WooCommerce Optimizer – Unloads heavy Woo scripts on non-shop pages.</li>
<li>Smart Fonts – Fixes CLS with fallback fonts and localizes Google Fonts.</li>
<li>Smart Media – Cloud Image CDN and auto-compression.</li>
<li>Asset Optimization – Async CSS, Defer JS, Smart JS Delay, and Critical CSS.</li>
<li>Security & Access – Security Headers (XSS protection) and A11Y fixes (Smart Access).</li>
<li>Database Detox – Auto-schedule cleanup for revisions and transients.</li>
<li>YouTube Lazy Load – Replaces heavy iframes with lightweight thumbnails.</li>
</ul>
<h4>Community Acceleration Network (Opt-In Feature)</h4>
Important: This is a peer-to-peer (P2P) network, NOT a traditional CDN like Cloudflare or AWS. Your site will both receive AND serve cached resources to other community members.
When enabled, your site can participate in the VN-Nexus Community Network to share cached resources and help accelerate loading for other community members.
Privacy & Transparency: 
* 100% anonymous participation 
* No personal data collected 
* Requires explicit user opt-in 
* Can be disabled anytime 
* Check your hosting provider’s Terms of Service before enabling (some hosts restrict P2P)
How it works: 
* Your site announces cached resource availability to the network 
* Other sites in the network can request these resources (typically 1-5MB/day for small sites, 10-20MB/day for medium traffic sites) 
* Everyone benefits from faster loading speeds 
* All communication is encrypted and anonymous
Note: This is an experimental community-driven project and not a replacement for commercial CDN services.
<h3>External Services</h3>
This plugin optionally connects to external services when specific features are enabled by the user.
<h4>VN-Nexus Community Network</h4>
Service URL: https://edge.vn-nexus.com
When Used: 
1. Social Boost: Connects to <code>edge.vn-nexus.com/boost/facebook</code> to optimize traffic flow when Social Boost is enabled and social traffic is detected. 
2. Community CDN: Connects to <code>edge.vn-nexus.com</code> (or configured node) to announce/retrieve public assets when Community CDN is enabled.
Data Sent: 
* Anonymous site identifier (MD5 hash of site URL) 
* Region code (derived from WordPress locale) 
* Public asset URLs (CSS/JS/Images) 
* Timestamp
Purpose: 
To enable peer-to-peer content acceleration and regional traffic optimization.
Privacy: 
* No personal data is collected or transmitted 
* Participation is 100% voluntary and opt-in
Privacy Policy: https://vn-speed.ttpdn.com/privacy.html 
Terms of Service: https://vn-speed.ttpdn.com/terms.html
<h4>VN-Nexus License API</h4>
Service URL: https://api.vn-nexus.com AND https://edge.vn-nexus.com/license
Operated By: VN-Nexus Project Contributors (same team that develops this plugin)
When Used: 
When validating PRO features or checking license status in plugin settings.
Data Sent: 
* License Key 
* Site URL 
* Plugin Version 
* Timestamp
Purpose: 
To validate software licenses and deliver feature updates.
Privacy: 
* Only technical data required for validation is sent 
* No personal user data is tracked 
* No content is accessed
Privacy Policy: https://vn-speed.ttpdn.com/privacy.html 
Terms of Service: https://vn-speed.ttpdn.com/terms.html
<h4>Google Fonts / YouTube</h4>
<ul>
<li>Google Fonts: Uses <code>preconnect</code> resource hints.</li>
<li>YouTube: Fetches thumbnails from <code>i.ytimg.com</code> for local caching if Lazy Load is enabled.</li>
</ul>
<h4>Weserv.nl Image CDN</h4>
Service URL: https://images.weserv.nl
When Used: 
When “Smart Image CDN” is enabled and no custom CDN URL is provided.
Data Sent: 
* Image URLs (to be fetched and optimized) 
* Visitor IP (standard HTTP log)
Purpose: 
To compress, resize, and serve images in next-gen formats (WebP) via a global edge network.
Privacy Policy: https://github.com/weserv/images/blob/5.x/Privacy-Policy.md 
Terms of Service: https://github.com/weserv/images/blob/5.x/LICENSE
<h4>VN-Speed Worker API</h4>
Service URL: https://edge.vn-nexus.com
When Used: 
When “Critical CSS” generation is triggered for the homepage or new posts.
Data Sent: 
* Page URL 
* Viewport Dimensions 
* HTML Content (for analysis)
Purpose: 
To generate Critical CSS to eliminate Render-Blocking resources and improve FCP/LCP.
Privacy Policy: https://vn-speed.ttpdn.com/privacy.html 
Terms of Service: https://vn-speed.ttpdn.com/terms.html
<h3>Developer Disclosure</h3>
Service Ownership: 
The VN-Nexus Community Network (edge.vn-nexus.com, api.vn-nexus.com) referenced in this plugin is operated by the same development team that maintains this plugin as an open-source project.
No Commercial Benefit: 
The plugin author does not financially benefit from users enabling Community Acceleration. This is a community-driven performance optimization network provided free of charge.
No Service Lock-In: 
Users can disable Community Acceleration entirely and still access 100% of the plugin’s core optimization features including: 
* Static HTML Cache 
* Asset Optimization (CSS/JS minification, defer, async) 
* Image Lazy Loading 
* Database Cleanup 
* Smart SEO & Schema 
* WooCommerce Optimization 
* And all other performance features
Community Acceleration is a completely optional enhancement and does not restrict access to any core functionality.

VN Speed Optimizer

High-performance optimization suite: Static HTML Cache, Async Assets, LCP Fixer, and Community CDN.

WordPress.org

This plugin optimizes the loading of images (and videos) with prioritization to improve <a href="https://web.dev/articles/lcp" rel="nofollow ugc">Largest Contentful Paint</a> (LCP), lazy loading, and more accurate image size selection.
The current optimizations include:
<ol>
<li>Add breakpoint-specific <code>fetchpriority=high</code> preload links (both as <code>LINK[rel=preload]</code> elements and <code>Link</code> response headers) for image URLs of LCP elements:
<ol>
<li>An <code>IMG</code> element, including the <code>srcset</code>/<code>sizes</code> attributes supplied as <code>imagesrcset</code>/<code>imagesizes</code> on the <code>LINK</code>.</li>
<li>The first <code>SOURCE</code> element with a <code>type</code> attribute in a <code>PICTURE</code> element. (Art-directed <code>PICTURE</code> elements using media queries are not supported.)</li>
<li>An element with a CSS <code>background-image</code> inline <code>style</code> attribute.</li>
<li>An element with a CSS <code>background-image</code> applied with a stylesheet (when the image is from an allowed origin).</li>
<li>A <code>VIDEO</code> element’s <code>poster</code> image.</li>
</ol>
</li>
<li>Ensure <code>fetchpriority=high</code> is only added to an <code>IMG</code> when it is the LCP element across all responsive breakpoints.</li>
<li>Add <code>fetchpriority=low</code> to <code>IMG</code> tags which appear in the initial viewport but are not visible, such as when they are subsequent carousel slides.</li>
<li>Lazy loading:
<ol>
<li>Apply lazy loading to <code>IMG</code> tags based on whether they appear in any breakpoint’s initial viewport.</li>
<li>Implement lazy loading of CSS background images added via inline <code>style</code> attributes.</li>
<li>Lazy-load <code>VIDEO</code> tags by setting the appropriate attributes based on whether they appear in the initial viewport. If a <code>VIDEO</code> is the LCP element, it gets <code>preload=auto</code>; if it is in an initial viewport, the <code>preload=metadata</code> default is left; if it is not in an initial viewport, it gets <code>preload=none</code>. Lazy-loaded videos also get initial <code>preload</code>, <code>autoplay</code>, and <code>poster</code> attributes restored when the <code>VIDEO</code> is going to enter the viewport.</li>
</ol>
</li>
<li>Responsive image sizes:
<ol>
<li>Ensure <a href="https://make.wordpress.org/core/2024/10/18/auto-sizes-for-lazy-loaded-images-in-wordpress-6-7/" rel="nofollow ugc"><code>sizes=auto</code></a> is set on <code>IMG</code> tags after setting correct lazy-loading (above).</li>
<li>~~Compute the <code>sizes</code> attribute using the widths of an image collected from URL Metrics for each breakpoint (when not lazy-loaded since then handled by <code>sizes=auto</code>).~~ (This has been removed due to an <a href="https://github.com/WordPress/performance/issues/2098" rel="nofollow ugc">issue</a>; use <a href="https://wordpress.org/plugins/auto-sizes/" rel="ugc">Enhanced Responsive Images instead</a>.)</li>
</ol>
</li>
<li>Reduce the size of the <code>poster</code> image of a <code>VIDEO</code> from full size to the size appropriate for the maximum width of the video (on desktop).</li>
</ol>
This plugin requires the <a href="https://wordpress.org/plugins/optimization-detective/" rel="ugc">Optimization Detective</a> plugin as a dependency. Please refer to that plugin for additional background on how this plugin works as well as additional developer options.
👉 Note: This plugin optimizes pages for actual visitors, and it depends on visitors to optimize pages. As such, you won’t see optimizations applied immediately after activating the plugin. Please wait for URL Metrics to be gathered for both mobile and desktop visits. And since administrator users are not normal visitors typically, optimizations are not applied for admins by default.
Your site must have the REST API accessible to unauthenticated frontend visitors since this is how metrics are collected about how a page should be optimized. There are currently no settings and no user interface for this plugin since it is designed to work without any configuration.

Image Prioritizer

Prioritizes the loading of images and videos based on how they appear to actual visitors: adds fetchpriority, preloads, lazy-loads, and sets sizes.

VN Speed Optimizer vs Image Prioritizer