CSS JS Manager, Async JavaScript, Defer Render Blocking CSS 2.4.37

Does "CSS JS Manager, Async JavaScript, Defer Render Blocking CSS" work with WordPress 5.9.3 and PHP 7.4.8? A smoke test was performed on .

Summary

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

Memory usage: 101.74 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 version5.9.3
PHP version7.4.8
MySQL version8.0.21
PHP memory limit256M
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=15173dbcf0
Aspect after-activation
HTTP status 200
Load time 0.488 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 0.446 s
Memory usage 3.31 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 0.218 s
Memory usage 3.44 MiB
JS errors None
Resource errors None

Critical CSS → Add New

Page screenshot: Critical CSS → Add New
URL /wp-admin/post-new.php?post_type=pi_critical_css
Aspect menu-item
HTTP status 200
Load time 0.328 s
Memory usage 3.54 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 0.349 s
Memory usage 3.47 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 0.916 s
Memory usage 5.77 MiB
JS errors None
Resource errors None

Benchmark

URL Load time Memory usage
Inactive Active Change Inactive Active Change
/wp-admin/index.php0.500 s0.387 s-0.113 s3.37 MiB3.44 MiB+ 75.53 KiB
/wp-admin/edit.php0.252 s0.265 s+0.013 s3.4 MiB3.47 MiB+ 74.82 KiB
/wp-admin/post-new.php1.125 s1.382 s+0.257 s5.69 MiB5.77 MiB+ 89.77 KiB
/wp-admin/upload.php0.877 s0.537 s-0.340 s3.25 MiB3.39 MiB+ 147.05 KiB
/wp-admin/options-writing.php0.311 s0.226 s-0.085 s3.24 MiB3.31 MiB+ 66.88 KiB
/wp-admin/media-new.php0.316 s0.284 s-0.032 s3.23 MiB3.37 MiB+ 147.23 KiB
/wp-admin/edit-tags.php?taxonomy=category0.219 s0.215 s-0.004 s3.27 MiB3.4 MiB+ 140.1 KiB
/wp-admin/post-new.php?post_type=page1.100 s0.959 s-0.141 s5.68 MiB5.76 MiB+ 85.36 KiB
/wp-admin/options-discussion.php0.287 s0.283 s-0.004 s3.22 MiB3.3 MiB+ 83.51 KiB
/wp-admin/edit-comments.php0.257 s0.250 s-0.007 s3.27 MiB3.4 MiB+ 138.42 KiB
/0.318 s0.222 s-0.096 s3.4 MiB3.47 MiB+ 70.42 KiB
Average 0.506 s0.455 s-0.050 s3.73 MiB3.83 MiB+ 101.74 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
PHP55.8%1,80662427
SVG41.5%1,34535
JavaScript1.4%44466
JSON0.9%3002
CSS0.4%13154
HTML0.0%101
Total 3,239 688 45

PHP Code Analysis | More results »

Lines of code 1,640
Total complexity 300
Median class complexity 11.5
Median method complexity 2.0
Most complex class Css_Js_Manager_Admin
Most complex function Critical_Css_Type::save_meta_box_data()
Classes 20
Methods 125
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

[07-Apr-2022 19:49:25 UTC] PHP Notice:  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