CSS JS Manager, Async JavaScript, Defer Render Blocking CSS 2.4.49.19

Does "CSS JS Manager, Async JavaScript, Defer Render Blocking CSS" work with WordPress 6.4.1 and PHP 8.1.12? A smoke test was performed on .

Summary

Errors
1PHP warnings
No JavaScript exceptions
All test pages loaded successfully
No resource errors
Performance

Memory usage: 72.93 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 version6.4.1
PHP version8.1.12
MySQL version10.6.10
PHP memory limit512M
Plugin Info
Last updated
Active installs 1,000+
WordPress.org page https://wordpress.org/plugins/css-js-manager/
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Pages 6

Plugins ‹ Test site — WordPress

Page screenshot: Plugins ‹ Test site — WordPress
URL /wp-admin/plugins.php?plugin_status=all&paged=1&s
Requested URL /wp-admin/plugins.php?action=activate&plugin=css-js-manager%2Fcss-js-manager.php&plugin_status=all&paged=1&s&_wpnonce=5dfd623c28
Aspect after-activation
HTTP status 200
Load time 0.453 s
Memory usage 3.4 MiB
JS errors None
Resource errors None

CSS JS Manager

Page screenshot: CSS JS Manager
URL /wp-admin/admin.php?page=css-js-manager
Aspect menu-item
HTTP status 200
Load time 0.351 s
Memory usage 3.36 MiB
JS errors None
Resource errors None

Critical CSS

Page screenshot: Critical CSS
URL /wp-admin/edit.php?post_type=pi_critical_css
Aspect menu-item
HTTP status 200
Load time 0.173 s
Memory usage 3.43 MiB
JS errors None
Resource errors None

Critical CSS → Add New Post

Page screenshot: Critical CSS → Add New Post
URL /wp-admin/post-new.php?post_type=pi_critical_css
Aspect menu-item
HTTP status 200
Load time 0.241 s
Memory usage 3.46 MiB
JS errors None
Resource errors None

Test site – Just another WordPress site

Page screenshot: Test site – Just another WordPress site
URL /
Aspect front-page
HTTP status 200
Load time 0.233 s
Memory usage 3.41 MiB
JS errors None
Resource errors None

Add New Post ‹ Test site — WordPress

Page screenshot: Add New Post ‹ Test site — WordPress
URL /wp-admin/post-new.php
Aspect new-meta-boxes
HTTP status 200
Load time 0.589 s
Memory usage 5.55 MiB
JS errors None
Resource errors None

Benchmark

URL Load time Memory usage
Inactive Active Change Inactive Active Change
/wp-admin/index.php0.334 s0.320 s-0.014 s3.38 MiB3.46 MiB+ 80.59 KiB
/wp-admin/edit.php0.207 s0.216 s+0.009 s3.41 MiB3.48 MiB+ 80.25 KiB
/wp-admin/post-new.php0.876 s0.593 s-0.283 s5.46 MiB5.55 MiB+ 91.16 KiB
/wp-admin/upload.php0.701 s0.462 s-0.239 s3.32 MiB3.39 MiB+ 64.39 KiB
/wp-admin/options-writing.php0.218 s0.228 s+0.010 s3.32 MiB3.37 MiB+ 56.95 KiB
/wp-admin/media-new.php0.320 s0.265 s-0.055 s3.29 MiB3.37 MiB+ 76.58 KiB
/wp-admin/edit-tags.php?taxonomy=category0.200 s0.192 s-0.008 s3.31 MiB3.39 MiB+ 81.75 KiB
/wp-admin/post-new.php?post_type=page0.611 s0.575 s-0.036 s5.45 MiB5.53 MiB+ 86.75 KiB
/wp-admin/options-discussion.php0.306 s0.244 s-0.062 s3.3 MiB3.37 MiB+ 64.85 KiB
/wp-admin/edit-comments.php0.250 s0.358 s+0.108 s3.34 MiB3.4 MiB+ 63.63 KiB
/0.294 s0.227 s-0.067 s3.36 MiB3.41 MiB+ 55.38 KiB
Average 0.392 s0.335 s-0.058 s3.72 MiB3.79 MiB+ 72.93 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
SVG
Language % Lines of code Comment lines Files
PHP55.2%1,76061926
SVG42.1%1,34535
JavaScript1.3%42486
JSON0.9%3002
CSS0.4%13154
HTML0.0%101
Total 3,191 685 44

PHP Code Analysis | More results »

Lines of code 1,594
Total complexity 285
Median class complexity 11.0
Median method complexity 2.0
Most complex class Css_Js_Manager_Admin
Most complex function Critical_Css_Type::save_meta_box_data()
Classes 19
Methods 119
Functions 6

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.

Database Tables 1

Options wp_options 1

Custom Post Types 1

ID Name
pi_critical_cssCritical CSS

Meta Boxes

{
    "post": {
        "select-critical-css": {
            "title": "Select Critical CSS",
            "context": "advanced"
        }
    },
    "pi_critical_css": {
        "critical-css": {
            "title": "Critical CSS",
            "context": "advanced"
        }
    },
    "page": {
        "select-critical-css": {
            "title": "Select Critical CSS",
            "context": "advanced"
        }
    }
}

PHP Error Log 1 lines

[10-Nov-2023 19:07:57 UTC] PHP Warning:  Undefined variable $global_css in /wp-content/plugins/css-js-manager/admin/critical-css-type.php on line 144
See also: All tests for this plugin, How to Hide CSS JS Manager, Async JavaScript, Defer Render Blocking CSS Admin Menus and Meta Boxes