by JoomUnited 4.7 (89 reviews)

WP Speed of Light

Name: WP Speed of Light
Rating: 4.7 (89 reviews)
Author: JoomUnited

WP Speed of Light is a WordPress speedup plugin and load time testing. Cache, Gzip, minify, group, Lazy Loading, CDN

WP Speed of Light ranks #2,833 among WordPress.org plugins with 6,000+ active installations, is #122 of 1,524 in the Performance category, a 4.7/5 rating from 89 reviews, and was last updated Jul 28, 2025. Data from WordPress.org, refreshed twice daily — see methodology.

Tested up to WP 6.8 (Current: 7.1)

v3.3.6 Current Version v3.3.6

Updated 1 year ago Last Update on 28 Jul, 2025

Refreshed 16 hours ago Last Refreshed on

#122 of 1,524 in Performance Top 5% by installs No update in over a year

View on WordPress.org

Rank

#2,833

— No change

Active Installs

6K+

-9.6%

KW Avg Position

0.4 better

Downloads

542.8K

+2 today

Support Resolved

— No change

Rating

94%

Review 4.7 out of 5

4.7 (89 reviews)

Next Milestone 7K

Total Progress 66%

6K+ 7K+

123

Ranks to Climb

Growth Needed

8,000,000

Active Installs

Pro

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Rank Changes

Current #2,833

Change

Best #

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Active Installs Growth

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Active Installs 0,000,000+

Growth +0.0%

Peak 0,000,000

Downloads Growth

Downloads

Growth

Peak

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Reviews & Ratings

4.7

89 reviews

Overall 94%

78 (88%)

3 (3%)

2 (2%)

0 (0%)

6 (7%)

Security History

Source: WPVulnerability

No known vulnerabilities on record for WP Speed of Light. Checked 4 days ago.

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Plugin Details

Version: 3.3.6
Last Updated: Jul 28, 2025
Requires WP: 4.7+
Tested Up To: 6.8
PHP Version: 5.6 or higher
Author: JoomUnited

Support & Rating

Rating: ★ ★ ★ ★ ★ 4.7
Reviews: 89
Support Threads: 0
Resolved: 0%

Keywords

cache caching performance performance test speed test

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TL;DR

AI summary of the plugin's readme

WP Speed of Light is for WordPress site owners who want to improve their site's loading speed. It provides caching, file minification and grouping, database cleanup, and CDN integration, along with tools to test and compare page loading performance.

Full static cache generation
GZIP compression check
Minify HTML, CSS, JS
Group CSS and JS files
Database optimization and cleanup
CDN integration
WooCommerce integration
Multisite compatibility

Frequently Asked Questions

Common questions about WP Speed of Light

It is, of course we can't test with all dynamic element, yet you have some options to exclude some specific URL from optimization. You are welcome to send us compatibility request on our pre-sale forum or on the plugin directory support forum.

Yes sure, WP Speed of Light have a dedicated integration with Gutenberg, it can auto cleanup the content cache on saving.

Yes, totally free of charge, fell free to install, update and even ask us questions on the WordPress plugin directory forum. We offer an optional free upgrade.

Yes, we use a translation tool accessible from the plugin setting where you can: get languages, translate, share translation with us (and get a gift for that)

Yes, we have added some specific code to remove specific dynamic data from cache.

In the plugin we've made a distinction between casual optimization like caching, Gzip compression, headers expire, query strings and advanced optimization like file group and minify. You can activate all optimizations but, depending on your website, number, and complexity of your plugins, that you remove some files or pages from this optimization to avoid problems. All websites cannot be 100% optimized, even the big websites on the market like amazon.com

Some Google pagespeed recommendations require that you modify your plugin code, at least how the script are called, to defer some script loading, for example. At Google they're actually smart enough not to consider a score based on criteria you can't apply on all website BUT on loading time (refer to the Google Search Console) Our recommendation here: 1. Focus only on loading time, not on your score 2. Use WebPageTest.org instead 3. All the tools are available to get a 100% page speed score in the plugin

Yes, because the CDN resource call use URLs along with content inclusion and exclusion options only, so you can use any CDN service.

Yes, there's a specific integration in the optional pro addon, that offer the automatic Varnish cache cleanup on content save and manual cleanup.

Yes, there's a specific integration in the optional pro addon, that offer the automatic Siteground SuperCacher cache cleaup on content save and manual cleaup.