Report - Slim SEO 3.21.1 - PluginTests.com

Does Slim SEO work with WordPress 6.2.2 and PHP 8.1.12? A smoke test was performed on 2023-06-05 10:47:25 UTC.

Summary

Errors

4	PHP deprecation warnings
2	JavaScript exceptions
	All test pages loaded successfully
	No resource errors

Performance

Memory usage: 125.13 KiB
The average PHP memory usage increased by this amount after activating by the plugin.

Page speed impact: insignificant.
The plugin didn't make the site noticeably slower.

Environment

WordPress version	6.2.2
PHP version	8.1.12
MySQL version	10.6.10
PHP memory limit	512M

Plugin Info

Last updated	2026-03-12T07:04:00+00:00
Active installs	60,000+
WordPress.org page	https://wordpress.org/plugins/slim-seo/
Badges	Get badge code

Pages 5

Slim SEO ‹ Test site — WordPress

URL	/wp-admin/options-general.php?page=slim-seo
Requested URL	/wp-admin/plugins.php?action=activate&plugin=slim-seo%2Fslim-seo.php&plugin_status=all&paged=1&s&_wpnonce=a9f47b84bd
Aspect	after-activation
HTTP status	200
Load time	1.032 s
Memory usage	3.24 MiB
JS errors	`[ { "message": "TypeError: Cannot read properties of null (reading 'addEventListener')\n at /wp-content/plugins/slim-seo/js/meta-tags/dist/settings.js?ver=1685951082:1:1620\n at /wp-content/plugins/slim-seo/js/meta-tags/dist/settings.js?ver=1685951082:1:2144", "trace": null, "code": null } ]`
Resource errors	None

Settings → Slim SEO

URL	/wp-admin/options-general.php?page=slim-seo
Aspect	menu-item
HTTP status	200
Load time	0.796 s
Memory usage	3.16 MiB
JS errors	`[ { "message": "TypeError: Cannot read properties of null (reading 'addEventListener')\n at /wp-content/plugins/slim-seo/js/meta-tags/dist/settings.js?ver=1685951082:1:1620\n at /wp-content/plugins/slim-seo/js/meta-tags/dist/settings.js?ver=1685951082:1:2144", "trace": null, "code": null } ]`
Resource errors	None

Test site – Just another WordPress site

URL	/
Aspect	front-page
HTTP status	200
Load time	0.381 s
Memory usage	3.21 MiB
JS errors	None
Resource errors	None

Add New Post ‹ Test site — WordPress

URL	/wp-admin/post-new.php
Aspect	new-meta-boxes
HTTP status	200
Load time	1.145 s
Memory usage	5.07 MiB
JS errors	None
Resource errors	None

Add New Page ‹ Test site — WordPress

URL	/wp-admin/post-new.php?post_type=page
Aspect	new-meta-boxes
HTTP status	200
Load time	0.786 s
Memory usage	5.06 MiB
JS errors	None
Resource errors	None

Benchmark

URL	Load time			Memory usage
URL	Inactive	Active	Change	Inactive	Active	Change
/wp-admin/index.php	0.438 s	0.406 s	-0.032 s	3.07 MiB	3.22 MiB	+ 150.41 KiB
/wp-admin/edit.php	0.334 s	0.408 s	+0.074 s	3.1 MiB	3.24 MiB	+ 149.28 KiB
/wp-admin/post-new.php	1.332 s	1.575 s	+0.243 s	5.02 MiB	5.07 MiB	+ 53.09 KiB
/wp-admin/upload.php	0.795 s	0.749 s	-0.046 s	3.02 MiB	3.14 MiB	+ 129.71 KiB
/wp-admin/options-writing.php	0.271 s	0.268 s	-0.003 s	3.01 MiB	3.13 MiB	+ 117.98 KiB
/wp-admin/media-new.php	0.430 s	0.266 s	-0.164 s	2.99 MiB	3.13 MiB	+ 141.53 KiB
/wp-admin/edit-tags.php?taxonomy=category	0.285 s	0.313 s	+0.028 s	3.01 MiB	3.15 MiB	+ 149.47 KiB
/wp-admin/post-new.php?post_type=page	1.026 s	1.049 s	+0.023 s	5.01 MiB	5.06 MiB	+ 48.91 KiB
/wp-admin/options-discussion.php	0.349 s	0.414 s	+0.065 s	3 MiB	3.13 MiB	+ 131.71 KiB
/wp-admin/edit-comments.php	0.349 s	0.371 s	+0.022 s	3.03 MiB	3.15 MiB	+ 129.59 KiB
/	0.469 s	0.280 s	-0.189 s	2.97 MiB	3.14 MiB	+ 174.7 KiB
Average	0.553 s	0.554 s	+0.002 s	3.38 MiB	3.51 MiB	+ 125.13 KiB

Code Statistics

Note: Third-party libraries and minified JS/CSS files are excluded from these statistics where possible, so the numbers you see here may be lower than those reported by other tools.

PHP

JavaScript

Language		%	Lines of code	Comment lines	Files
	PHP	83.8%	5,120	203	96
	JavaScript	12.6%	773	78	6
	XSLT	2.3%	138	0	1
	CSS	1.3%	82	2	5
Total			6,113	283	108

PHP Code Analysis | More results »

Lines of code	4,897
Total complexity	1,022
Median class complexity	8.0
Median method complexity	1.0
Most complex class	SlimSEO\Redirection\Redirection
Most complex function	SlimSEO\Redirection\Redirection::redirect()

Classes	88
Methods	494
Functions	0

Additions

Things that the plugin adds to the site. This section is not intended to be comprehensive. The test tool only looks for a few specific types of added content.

Options `wp_options` 1

slim_seo_db_version

Meta Boxes

{
    "post": {
        "slim-seo": {
            "title": "Search Engine Optimization",
            "context": "normal"
        }
    },
    "page": {
        "slim-seo": {
            "title": "Search Engine Optimization",
            "context": "normal"
        },
        "postexcerpt": {
            "title": "Excerpt",
            "context": "normal"
        }
    }
}

PHP Error Log 4 lines

[05-Jun-2023 10:47:48 UTC] PHP Deprecated:  Automatic conversion of false to array is deprecated in /wp-content/plugins/slim-seo/src/Upgrade.php on line 29
[05-Jun-2023 10:47:48 UTC] PHP Deprecated:  Automatic conversion of false to array is deprecated in /wp-content/plugins/slim-seo/src/Upgrade.php on line 29
[05-Jun-2023 10:47:48 UTC] PHP Deprecated:  Automatic conversion of false to array is deprecated in /wp-content/plugins/slim-seo/src/Upgrade.php on line 29
[05-Jun-2023 10:47:48 UTC] PHP Deprecated:  Automatic conversion of false to array is deprecated in /wp-content/plugins/slim-seo/src/Upgrade.php on line 29

Slim SEO 3.21.1