Report - MC4WP: Mailchimp for WordPress 4.8.2

Does MC4WP: Mailchimp for WordPress work with WordPress 5.6 and PHP 7.4.8? A smoke test was performed on 2021-01-20 14:00:06 UTC.

Summary

Errors

	No PHP errors, warnings or notices
	No JavaScript exceptions
	All test pages loaded successfully
	No resource errors
	Looks good! No problems were detected.

Performance

Memory usage: 195.62 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	5.6
PHP version	7.4.8
MySQL version	8.0.21
PHP memory limit	256M

Plugin Info

Last updated	2026-03-09T08:01:00+00:00
Active installs	1,000,000+
WordPress.org page	https://wordpress.org/plugins/mailchimp-for-wp/
Badges	Get badge code

Pages 8

Plugins ‹ Test site — WordPress

URL	/wp-admin/plugins.php?plugin_status=all&paged=1&s
Requested URL	/wp-admin/plugins.php?action=activate&plugin=mailchimp-for-wp%2Fmailchimp-for-wp.php&plugin_status=all&paged=1&s&_wpnonce=edd2102335
Aspect	after-activation
HTTP status	200
Load time	0.283 s
Memory usage	3.05 MiB
JS errors	None
Resource errors	None

MC4WP

URL	/wp-admin/admin.php?page=mailchimp-for-wp
Aspect	menu-item
HTTP status	200
Load time	0.253 s
Memory usage	2.94 MiB
JS errors	None
Resource errors	None

MC4WP → Form

URL	/wp-admin/admin.php?page=mailchimp-for-wp-forms&view=add-form
Requested URL	/wp-admin/admin.php?page=mailchimp-for-wp-forms
Aspect	menu-item
HTTP status	200
Load time	0.221 s
Memory usage	2.95 MiB
JS errors	None
Resource errors	None

MC4WP → Integrations

URL	/wp-admin/admin.php?page=mailchimp-for-wp-integrations
Aspect	menu-item
HTTP status	200
Load time	0.187 s
Memory usage	2.95 MiB
JS errors	None
Resource errors	None

MC4WP → Other

URL	/wp-admin/admin.php?page=mailchimp-for-wp-other
Aspect	menu-item
HTTP status	200
Load time	0.164 s
Memory usage	2.96 MiB
JS errors	None
Resource errors	None

MC4WP → Add-ons

URL	/wp-admin/admin.php?page=mailchimp-for-wp-extensions
Aspect	menu-item
HTTP status	200
Load time	0.183 s
Memory usage	2.92 MiB
JS errors	None
Resource errors	None

Test site – Just another WordPress site

URL	/
Aspect	front-page
HTTP status	200
Load time	0.193 s
Memory usage	2.71 MiB
JS errors	None
Resource errors	None

Widgets ‹ Test site — WordPress

URL	/wp-admin/widgets.php
Aspect	new-sidebar-widgets
HTTP status	200
Load time	0.926 s
Memory usage	2.97 MiB
JS errors	None
Resource errors	None

Benchmark

URL	Load time			Memory usage
URL	Inactive	Active	Change	Inactive	Active	Change
/wp-admin/index.php	0.269 s	0.298 s	+0.029 s	2.79 MiB	2.96 MiB	+ 174.11 KiB
/wp-admin/edit.php	0.181 s	0.193 s	+0.012 s	2.84 MiB	3 MiB	+ 172.27 KiB
/wp-admin/post-new.php	1.399 s	0.719 s	-0.680 s	4.93 MiB	5.17 MiB	+ 245.95 KiB
/wp-admin/upload.php	0.498 s	0.434 s	-0.064 s	2.67 MiB	2.89 MiB	+ 227.88 KiB
/wp-admin/options-writing.php	0.258 s	0.168 s	-0.090 s	2.68 MiB	2.87 MiB	+ 196.22 KiB
/wp-admin/media-new.php	0.212 s	0.177 s	-0.035 s	2.65 MiB	2.87 MiB	+ 228.41 KiB
/wp-admin/edit-tags.php?taxonomy=category	0.174 s	0.185 s	+0.011 s	2.68 MiB	2.9 MiB	+ 229.32 KiB
/wp-admin/post-new.php?post_type=page	0.620 s	0.570 s	-0.050 s	4.92 MiB	5.16 MiB	+ 245.54 KiB
/wp-admin/options-discussion.php	0.195 s	0.220 s	+0.025 s	2.65 MiB	2.87 MiB	+ 229.04 KiB
/wp-admin/edit-comments.php	0.210 s	0.210 s	+0.000 s	2.75 MiB	2.91 MiB	+ 164.27 KiB
/	0.279 s	0.217 s	-0.062 s	2.67 MiB	2.71 MiB	+ 38.78 KiB
Average	0.390 s	0.308 s	-0.082 s	3.11 MiB	3.3 MiB	+ 195.62 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.

JavaScript

PHP

Language		%	Lines of code	Comment lines	Files
	JavaScript	60.3%	16,830	2,007	8
	PHP	29.8%	8,328	5,413	124
	CSS	6.2%	1,721	73	5
	Markdown	3.0%	851	0	1
	SVG	0.3%	95	1	3
	XML	0.3%	91	0	2
Total			27,916	7,494	143

PHP Code Analysis | More results »

Lines of code	6,937
Total complexity	1,420
Median class complexity	14.0
Median method complexity	1.0
Most complex class	MC4WP_API_V3
Most complex function	_mc4wp_update_groupings_data()

Classes	67
Methods	561
Functions	53

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` 4

mc4wp
mc4wp_flash_messages
mc4wp_version
widget_mc4wp_form_widget

Custom Post Types 1

ID	Name
mc4wp-form	Mailchimp Sign-up Forms

Sidebar Widgets 1

ID	Name
mc4wp_form_widget	Mailchimp Sign-Up Form

PHP Error Log

The log file is empty.

MC4WP: Mailchimp for WordPress 4.8.2