WordPress.org

Македонски

Get WordPress
WordPress.org

Plugin Directory

Performance Lab

Performance Lab

By WordPress Performance Team
Download
Live Preview

Description

The Performance Lab plugin is a collection of features focused on enhancing the performance of your site, most of which should eventually be merged into WordPress core. The plugin facilitates the discovery and activation of the individual performance feature plugins which the performance team is developing. In this way you can test the features to get their benefits before they become available in WordPress core. You can also play an important role by providing feedback to further improve the solutions.

The feature plugins which are currently featured by this plugin are:

These plugins can also be installed separately from installing Performance Lab, but having the Performance Lab plugin also active will ensure you find out about new performance features as they are developed.

Installation

Installation from within WordPress

  1. Visit Plugins > Add New.
  2. Search for Performance Lab.
  3. Install and activate the Performance Lab plugin.

Manual installation

  1. Upload the entire performance-lab folder to the /wp-content/plugins/ directory.
  2. Visit Plugins.
  3. Activate the Performance Lab plugin.

After activation

  1. Visit the new Settings > Performance menu.
  2. Enable the individual features you would like to use.

FAQ

What is the purpose of this plugin?

The primary purpose of the Performance Lab plugin is to allow testing of various performance features for which the goal is to eventually land in WordPress core. It is essentially a collection of “feature plugins”, which makes it different from other performance plugins that offer performance features which are not targeted at WordPress core and potentially rely on functionality that would not be feasible to use in WordPress core. The list of available features will regularly change: Existing features may be removed after they have been released in WordPress core, while new features may be added in any release.

Can I use this plugin on my production site?

Per the primary purpose of the plugin (see above), it can mostly be considered a beta testing plugin for the various performance features it includes. However, it’s essential to understand that utilizing it comes with inherent risks. Users are encouraged to proceed with caution and understand that they are doing so at their own risk.

Where can I submit my plugin feedback?

Feedback is encouraged and much appreciated, especially since this plugin is a collection of future WordPress core features. If you have suggestions or requests for new features, you can submit them as an issue in the Performance Lab GitHub repository. If you need help with troubleshooting or have a question about the plugin, please create a new topic on our support forum.

Where can I report security bugs?

The Performance team and WordPress community take security bugs seriously. We appreciate your efforts to responsibly disclose your findings, and will make every effort to acknowledge your contributions.

To report a security issue, please visit the WordPress HackerOne program.

How can I contribute to the plugin?

Contributions are always welcome! Learn more about how to get involved in the Core Performance Team Handbook.

Reviews

great for testing, idk how great for production

март 11, 2026 4 replies
been using a few of the plugins and metrics for testing and scaling, been using some of the plugins noted there on some production sites, but I do advise on never installing the plugins that require optimization detective. let's hope they make it to core fast!

Good performance improvements but needs polishing

февруари 15, 2026
I have tested this plugin on a few sites and it provides some useful performance features that are helpful for optimization and experimentation. The modular approach is nice and makes it easy to enable or disable specific options. However, the interface and documentation could be improved for better clarity, especially for non-technical users. Overall, it’s a solid plugin with potential, but still needs refinement for a smoother production workflow.

Essential for modern WP sites! Now 100% translated into Persian

јануари 6, 2026
Performance Lab is the gateway to the future of WordPress. These tools are crucial for anyone serious about site speed, Core Web Vitals, and modern image formats. I have personally translated and reviewed 100% of the strings for the entire Performance Lab ecosystem, including all standalone plugins (WebP Uploads, Speculation Rules, View Transitions, etc.) and their respective Readme files. As the PTE (Translation Editor), I’ve ensured that complex technical terms are translated accurately to help the Persian WordPress community implement these performance enhancements with ease. Kudos to the performance team for these high-quality tools! Best regards, @saeidafshari دوستان و توسعه‌دهندگان گرامی، مجموعه افزونه‌های رسمی تیم کارایی وردپرس، شامل ۱۲ ابزار تخصصی برای افزایش سرعت و بهینه‌سازی سایت، به صورت ۱۰۰٪ فارسی‌سازی و بازبینی شد. تمام مفاهیم مدرن مثل قوانین پیش‌بینی مرورگر و بهینه‌سازی تصاویر به دقت معادل‌سازی شده‌اند تا بتوانید بدون ابهام فنی، از آخرین تکنولوژی‌های جهانی در سایت‌های ایرانی استفاده کنید. با احترام، سعید افشاری
Read all 51 reviews

Contributors & Developers

“Performance Lab” is open source software. The following people have contributed to this plugin.

Contributors

“Performance Lab” has been translated into 27 locales. Thank you to the translators for their contributions.

Translate “Performance Lab” into your language.

Interested in development?

Browse the code, check out the SVN repository, or subscribe to the development log by RSS.

Changelog

4.2.0

Enhancements

  • Add declare( strict_types = 1 ) to all PHP files. (2424)
  • Bump minimum PHP requirement from 7.2 to 7.4. (2469)
  • Enqueued Assets audit: treat zero-size and no-store responses as errors. (2481)
  • Server Timing – Allow description and make duration optional. (2379)

4.1.0

Bug Fixes

  • Fix invalid Server-Timing logic for database query timing when $wpdb->queries is null due to no query having been done yet. (2346)

Documentation

  • Remove Web Worker Offloading from being featured by Performance Lab. (2404)

4.0.1

Bug Fixes

  • Add notices and improved type checking for $wpdb->queries when attempting to compute server-timing for database queries. (2159)
  • Skip stylesheets with empty href attributes in Site Health audit. (2281, 2328)
  • Use proper escape function. (2246)

4.0.0

Enhancements

  • Add Instant Back/Forward to list of performance feature plugins. (2119)
  • Add admin pointers to promote new Performance Lab features. (2122)
  • Implement opt-in PERFLAB_PLACE_OBJECT_CACHE_DROPIN for Server-Timing object-cache.php placement. (1996)
  • Use wp_is_rest_endpoint() to detect if we are handling a REST API request. (2094)

Bug Fixes

  • Fix TypeError in perflab_aao_query_autoloaded_options() by serializing non-scalar option values. (1934)
  • Omit admin pointer for new plugin if plugin is already active. (2143)
  • Prevent effective asset cache headers audit from running on local/development environments. (2035)
  • Use HTML Tag Processor to audit blocking scripts & styles in Site Health’s enqueued-assets test. (2059)

3.9.0

Enhancements

  • Remove experimental flags from Embed Optimizer and Image Prioritizer. (1846)

3.8.0

Enhancements

  • Add Site Health test for Cache-Control: no-store page response header which disables bfcache. (1807)
  • Add Site Health test to verify that static assets are served with far-future expires. (1727)
  • Enqueue scripts using plugins_url() instead of plugin_dir_url(). (1761)

3.7.0

Enhancements

  • Add guidance for managing Performance feature plugins. (1734)
  • Automatically discover plugin dependencies when obtaining Performance feature plugins from WordPress.org. (1680)
  • Disregard transient cache in perflab_query_plugin_info() when a plugin is absent. (1694)
  • Minify script used for ajax activation of features; warn if absent and serve original file when SCRIPT_DEBUG is enabled. (1658)

Bug Fixes

  • Fix latest plugin version not being downloaded consistently. (1693)

3.6.1

Bug Fixes

  • Fix race condition bug where activating multiple features sequentially could fail to activate some features. (#1675)

3.6.0

Enhancements

  • Use AJAX for activating features / plugins in Performance Lab. (1646)
  • Introduce AVIF header health check. (1612)
  • Install and activate Optimization Detective when the Embed Optimizer feature is activated from the Performance screen. (1644)

Bug Fixes

  • Fix uses of ‘Plugin not found’ string. (1651)

3.5.1

Bug Fixes

  • Account for plugin dependencies when storing relevant plugin info. (1613)

3.5.0

Enhancements

  • Add Web Worker Offloading to list of Performance features. (1577)
  • Only store info for relevant standalone plugins in the transient cache. (1573)
  • Use a single WordPress.org API request to get information for all plugins. (1562)

3.4.1

Bug Fixes

  • Fix Incorrect use of _n(). (1491)

3.4.0

Enhancements

  • Remove Server-Timing metric for the autoloaded options query time. (1456)

Bug Fixes

  • Avoid sending Server-Timing header when buffer is being cleaned. (1443)
  • Fix disabled options from reappearing in Site Health after external update. (1374)
  • Improve Performance screen when external requests to WordPress.org fail. (1474)

3.3.1

Enhancements

  • Add PHPStan strict rules (except for empty.notAllowed). (1241)

Bug Fixes

  • Allow null to be passed into perflab_admin_pointer(). (1393)

3.3.0

Enhancements

  • Bump minimum WP versions and WP version tested up to. (1333)
  • Improve message for WebP site health test. (1249)
  • Remove ‘Requires at least’ and ‘Requires PHP’ from plugin readmes. (1334)
  • Upgrade PHPStan to 1.11.6. (1325)

Bug Fixes

  • Extend core’s Autoloaded Options Site Health test if present (in WP 6.6). (1298)
  • Fix unit tests for multisite. (1327)

3.2.0

Enhancements

  • Add install note after each PerfLab feature plugin in the plugin list table. (1265)
  • Update plugins with new banners and icons. (1272)

Bug Fixes

  • Fix Server-Timing compatibility with other plugins that do output buffering. (1260)
  • Harden autoloaded-options site health test for incorrectly implemented external object cache plugins. (1238)

3.1.0

Enhancements