Report - MC4WP: Mailchimp for WordPress 4.8.4

Does MC4WP: Mailchimp for WordPress work with WordPress 5.7.2 and PHP 7.4.8? A smoke test was performed on 2021-05-13 01:18:40 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: 201.31 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	5.7.2
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=50b1af37ac
Aspect	after-activation
HTTP status	200
Load time	0.292 s
Memory usage	3.08 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	0.231 s
Memory usage	2.97 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	0.200 s
Memory usage	2.98 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	0.226 s
Memory usage	2.99 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	2.99 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	0.159 s
Memory usage	2.95 MiB
JS errors	None
Resource errors	None

Test site – Just another WordPress site

URL	/
Aspect	front-page
HTTP status	200
Load time	0.162 s
Memory usage	2.74 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	0.991 s
Memory usage	3 MiB
JS errors	None
Resource errors	None

Benchmark

URL	Load time			Memory usage
URL	Inactive	Active	Change	Inactive	Active	Change
/wp-admin/index.php	0.270 s	0.276 s	+0.006 s	2.82 MiB	2.99 MiB	+ 176.14 KiB
/wp-admin/edit.php	0.211 s	0.230 s	+0.019 s	2.86 MiB	3.1 MiB	+ 238.3 KiB
/wp-admin/post-new.php	1.269 s	1.077 s	-0.192 s	5.02 MiB	5.28 MiB	+ 265.28 KiB
/wp-admin/upload.php	0.532 s	0.441 s	-0.091 s	2.7 MiB	2.92 MiB	+ 230.64 KiB
/wp-admin/options-writing.php	0.205 s	0.202 s	-0.003 s	2.71 MiB	2.9 MiB	+ 198.25 KiB
/wp-admin/media-new.php	0.345 s	0.191 s	-0.154 s	2.67 MiB	2.9 MiB	+ 230.45 KiB
/wp-admin/edit-tags.php?taxonomy=category	0.215 s	0.205 s	-0.010 s	2.77 MiB	2.93 MiB	+ 167.35 KiB
/wp-admin/post-new.php?post_type=page	1.080 s	0.736 s	-0.344 s	5.01 MiB	5.27 MiB	+ 264.87 KiB
/wp-admin/options-discussion.php	0.267 s	0.264 s	-0.003 s	2.67 MiB	2.9 MiB	+ 231.07 KiB
/wp-admin/edit-comments.php	0.221 s	0.213 s	-0.008 s	2.78 MiB	2.95 MiB	+ 174.3 KiB
/	0.310 s	0.227 s	-0.083 s	2.71 MiB	2.74 MiB	+ 37.8 KiB
Average	0.448 s	0.369 s	-0.078 s	3.16 MiB	3.35 MiB	+ 201.31 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

CSS

Language		%	Lines of code	Comment lines	Files
	PHP	68.5%	8,311	5,427	124
	JavaScript	14.8%	1,798	191	37
	CSS	8.1%	988	40	8
	Markdown	7.1%	858	0	1
	SVG	0.8%	95	1	3
	XML	0.7%	91	0	2
Total			12,141	5,659	175

PHP Code Analysis | More results »

Lines of code	6,920
Total complexity	1,421
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	562
Functions	54

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 4.8.4