WordPress.org

<p>This plugin captures real user metrics about what elements are displayed on the page across a variety of device form factors (e.g. desktop, tablet, and phone) in order to apply loading optimizations which are not possible with WordPress’s current server-side heuristics.</p>
<p>This plugin is a framework dependency which does not provide optimization functionality on its own. For that, please install the <a href="https://wordpress.org/plugins/image-prioritizer/" rel="ugc">Image Prioritizer</a> and <a href="https://wordpress.org/plugins/embed-optimizer/" rel="ugc">Embed Optimizer</a> dependent plugins (among <a href="https://github.com/WordPress/performance/labels/%5BPlugin%5D%20Optimization%20Detective" rel="nofollow ugc">others</a> to come from the WordPress Core Performance team). There are currently <strong>no settings</strong> and no user interface for this plugin since it is designed to work without any configuration.</p>
<p>Your site must currently have the <strong>REST API accessible</strong> to unauthenticated frontend visitors since this is how real user metrics are collected about pages on your site; nevertheless, <a href="https://github.com/WordPress/performance/issues/1311" rel="nofollow ugc">exploration</a> is underway for providing alternative mechanisms for collecting the metrics. Also, please note that no metrics are currently collected from Safari since it does not yet support the <a href="https://developer.mozilla.org/en-US/docs/Web/API/LargestContentfulPaint" rel="nofollow ugc">Largest Contentful Paint</a> metric, but support for this <a href="https://web.dev/explore/learn-core-web-vitals" rel="nofollow ugc">Core Web Vitals</a> metric is coming this year <a href="https://webkit.org/blog/16458/announcing-interop-2025/#core-web-vitals" rel="nofollow ugc">via Interop 2025</a>.</p>
<p>Please refer to the <a href="https://github.com/WordPress/performance/blob/trunk/plugins/optimization-detective/docs/README.md" rel="nofollow ugc">full plugin documentation</a> for a <a href="https://github.com/WordPress/performance/blob/trunk/plugins/optimization-detective/docs/introduction.md" rel="nofollow ugc">technical introduction</a>, <a href="https://github.com/WordPress/performance/blob/trunk/plugins/optimization-detective/docs/hooks.md" rel="nofollow ugc">filter/action hooks</a>, and <a href="https://github.com/WordPress/performance/blob/trunk/plugins/optimization-detective/docs/extensions.md" rel="nofollow ugc">extensions</a> that show use cases and examples. You can also watch the talk from WordCamp Asia 2025: <a href="https://weston.ruter.net/2025/02/21/boosting-performance-with-optimization-detective/" rel="nofollow ugc">Boosting Performance with Optimization Detective</a>.</p>


Optimization Detective

Provides a framework for leveraging real user metrics to detect optimizations for improving page performance.

SpeedVitals

<p>SpeedVitals RUM WordPress plugin provides seamless integration of SpeedVitals Real-User Monitoring into your WordPress site. Monitor and analyze your website’s performance metrics in real-time with SpeedVitals RUM.</p>
<p>Features:</p>
<ul>
<li>Easy integration with SpeedVitals RUM</li>
<li>Configurable script placement (header/footer)</li>
<li>Flexible script loading options (defer/async)</li>
<li>Simple setup with minimal configuration</li>
</ul>
<h3>Configuration</h3>
<ol>
<li>
<p>Site ID (Required)</p>
<ul>
<li>Enter your SpeedVitals RUM Site ID</li>
<li>This is required for the plugin to function</li>
</ul>
</li>
<li>
<p>Script Position (Optional)</p>
<ul>
<li>Header (default): Places the script in the  section</li>
<li>Footer: Places the script at the end of the  section</li>
</ul>
</li>
<li>
<p>Script Loading (Optional)</p>
<ul>
<li>Defer (default): Loads the script after HTML parsing</li>
<li>Async: Loads the script asynchronously with HTML parsing</li>
<li>None: Loads the script normally without any loading attribute</li>
</ul>
</li>
</ol>
<h3>Usage</h3>
<p>Once configured with a valid Site ID, the plugin will automatically insert the SpeedVitals RUM tracking script into your website. The script will collect performance metrics and send them to your SpeedVitals dashboard.</p>
<h3>External Services</h3>
<p>This plugin sends data to the SpeedVitals API to monitor website performance metrics via Real User Monitoring (RUM). The library we are using to send the data is based built upon the Google Chrome’s Web Vitals Library (https://github.com/GoogleChrome/web-vitals).</p>
<ul>
<li>Data Sent: Performance metrics like page load time, resource timings, user-agent info, and other web vitals are sent to SpeedVitals servers.</li>
<li>When: Data is sent automatically whenever users visit any page of your website</li>
<li>Data storage: Data is stored in the EU servers for GDPR Compliance</li>
<li>Service Provider: SpeedVitals (SpeedVitals Private Limited)</li>
<li>Terms of Service: https://app.speedvitals.com/terms-of-use</li>
<li>Privacy Policy: https://speedvitals.com/privacy-policy</li>
</ul>
<h3>Support</h3>
<p>For support and documentation, please visit https://speedvitals.com/contact-us</p>
<h3>License</h3>
<p>This plugin is licensed under the GPL v2 or later.</p>
<p>For the full license text, please see the GNU General Public License v2.0 at https://www.gnu.org/licenses/gpl-2.0.html.</p>


SpeedVitals RUM

Integrates SpeedVitals RUM Script in your WordPress Website

Optimization Detective vs SpeedVitals RUM