Report - W3 Total Cache 2.8.1

Does W3 Total Cache work with WordPress 6.7.1 and PHP 8.1.12? A smoke test was performed on 2024-12-10 18:18:45 UTC.

Summary

Errors

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

Performance

Memory usage: 529.67 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	6.7.1
PHP version	8.1.12
MySQL version	10.6.10
PHP memory limit	512M

Plugin Info

Last updated	2026-06-24T18:05:00+00:00
Active installs	900,000+
WordPress.org page	https://wordpress.org/plugins/w3-total-cache/
Badges	Get badge code

Pages 20

Plugins ‹ Test site — WordPress

URL	/wp-admin/plugins.php?plugin_status=all&paged=1&s
Requested URL	/wp-admin/plugins.php?action=activate&plugin=w3-total-cache%2Fw3-total-cache.php&plugin_status=all&paged=1&s&_wpnonce=137651a8f0
Aspect	after-activation
HTTP status	200
Load time	0.528 s
Memory usage	4.32 MiB
JS errors	None
Resource errors	None

Performance

URL	/wp-admin/admin.php?page=w3tc_setup_guide
Requested URL	/wp-admin/admin.php?page=w3tc_dashboard
Aspect	menu-item
HTTP status	200
Load time	0.683 s
Memory usage	4.23 MiB
JS errors	None
Resource errors	None

Performance → Feature Showcase

URL	/wp-admin/admin.php?page=w3tc_setup_guide
Requested URL	/wp-admin/admin.php?page=w3tc_feature_showcase
Aspect	menu-item
HTTP status	200
Load time	0.287 s
Memory usage	4.23 MiB
JS errors	None
Resource errors	None

Performance → General Settings

URL	/wp-admin/admin.php?page=w3tc_setup_guide
Requested URL	/wp-admin/admin.php?page=w3tc_general
Aspect	menu-item
HTTP status	200
Load time	0.302 s
Memory usage	4.23 MiB
JS errors	None
Resource errors	None

Performance → Page Cache

URL	/wp-admin/admin.php?page=w3tc_setup_guide
Requested URL	/wp-admin/admin.php?page=w3tc_pgcache
Aspect	menu-item
HTTP status	200
Load time	0.287 s
Memory usage	4.23 MiB
JS errors	None
Resource errors	None

Performance → Minify

URL	/wp-admin/admin.php?page=w3tc_setup_guide
Requested URL	/wp-admin/admin.php?page=w3tc_minify
Aspect	menu-item
HTTP status	200
Load time	0.301 s
Memory usage	4.23 MiB
JS errors	None
Resource errors	None

Performance → Database Cache

URL	/wp-admin/admin.php?page=w3tc_setup_guide
Requested URL	/wp-admin/admin.php?page=w3tc_dbcache
Aspect	menu-item
HTTP status	200
Load time	0.253 s
Memory usage	4.23 MiB
JS errors	None
Resource errors	None

Performance → Object Cache

URL	/wp-admin/admin.php?page=w3tc_setup_guide
Requested URL	/wp-admin/admin.php?page=w3tc_objectcache
Aspect	menu-item
HTTP status	200
Load time	0.269 s
Memory usage	4.23 MiB
JS errors	None
Resource errors	None

Performance → Browser Cache

URL	/wp-admin/admin.php?page=w3tc_setup_guide
Requested URL	/wp-admin/admin.php?page=w3tc_browsercache
Aspect	menu-item
HTTP status	200
Load time	0.286 s
Memory usage	4.23 MiB
JS errors	None
Resource errors	None

Performance → Cache Groups

URL	/wp-admin/admin.php?page=w3tc_setup_guide
Requested URL	/wp-admin/admin.php?page=w3tc_cachegroups
Aspect	menu-item
HTTP status	200
Load time	0.298 s
Memory usage	4.23 MiB
JS errors	None
Resource errors	None

Performance → CDN

URL	/wp-admin/admin.php?page=w3tc_setup_guide
Requested URL	/wp-admin/admin.php?page=w3tc_cdn
Aspect	menu-item
HTTP status	200
Load time	0.297 s
Memory usage	4.23 MiB
JS errors	None
Resource errors	None

Performance → Support

URL	/wp-admin/admin.php?page=w3tc_setup_guide
Requested URL	/wp-admin/admin.php?page=w3tc_support
Aspect	menu-item
HTTP status	200
Load time	0.384 s
Memory usage	4.23 MiB
JS errors	None
Resource errors	None

Performance → Google PageSpeed

URL	/wp-admin/admin.php?page=w3tc_setup_guide
Requested URL	/wp-admin/admin.php?page=w3tc_pagespeed
Aspect	menu-item
HTTP status	200
Load time	0.267 s
Memory usage	4.23 MiB
JS errors	None
Resource errors	None

Performance → User Experience

URL	/wp-admin/admin.php?page=w3tc_setup_guide
Requested URL	/wp-admin/admin.php?page=w3tc_userexperience
Aspect	menu-item
HTTP status	200
Load time	0.269 s
Memory usage	4.23 MiB
JS errors	None
Resource errors	None

Performance → Install

URL	/wp-admin/admin.php?page=w3tc_setup_guide
Requested URL	/wp-admin/admin.php?page=w3tc_install
Aspect	menu-item
HTTP status	200
Load time	0.268 s
Memory usage	4.23 MiB
JS errors	None
Resource errors	None

Performance → Setup Guide

URL	/wp-admin/admin.php?page=w3tc_setup_guide
Aspect	menu-item
HTTP status	200
Load time	0.217 s
Memory usage	4.23 MiB
JS errors	None
Resource errors	None

Performance → About

URL	/wp-admin/admin.php?page=w3tc_setup_guide
Requested URL	/wp-admin/admin.php?page=w3tc_about
Aspect	menu-item
HTTP status	200
Load time	0.258 s
Memory usage	4.23 MiB
JS errors	None
Resource errors	None

Performance → Extensions

URL	/wp-admin/admin.php?page=w3tc_setup_guide
Requested URL	/wp-admin/admin.php?page=w3tc_extensions
Aspect	menu-item
HTTP status	200
Load time	0.270 s
Memory usage	4.23 MiB
JS errors	None
Resource errors	None

Performance → Statistics

URL	/wp-admin/admin.php?page=w3tc_setup_guide
Requested URL	/wp-admin/admin.php?page=w3tc_stats
Aspect	menu-item
HTTP status	200
Load time	0.253 s
Memory usage	4.23 MiB
JS errors	None
Resource errors	None

Test site – Just another WordPress site

URL	/
Aspect	front-page
HTTP status	200
Load time	0.261 s
Memory usage	3.63 MiB
JS errors	None
Resource errors	None

Benchmark

URL	Load time			Memory usage
URL	Inactive	Active	Change	Inactive	Active	Change
/wp-admin/index.php	0.315 s	0.487 s	+0.172 s	3.48 MiB	4.06 MiB	+ 592.86 KiB
/wp-admin/edit.php	0.219 s	0.196 s	-0.023 s	3.54 MiB	4.14 MiB	+ 615.78 KiB
/wp-admin/post-new.php	0.865 s	0.981 s	+0.116 s	5.92 MiB	6.56 MiB	+ 650.13 KiB
/wp-admin/upload.php	0.839 s	0.490 s	-0.349 s	3.49 MiB	4.02 MiB	+ 534.87 KiB
/wp-admin/options-writing.php	0.243 s	0.232 s	-0.011 s	3.47 MiB	3.97 MiB	+ 515.2 KiB
/wp-admin/media-new.php	0.299 s	0.273 s	-0.026 s	3.46 MiB	3.97 MiB	+ 523.4 KiB
/wp-admin/edit-tags.php?taxonomy=category	0.213 s	0.199 s	-0.014 s	3.47 MiB	4 MiB	+ 534.07 KiB
/wp-admin/post-new.php?post_type=page	0.716 s	0.673 s	-0.043 s	5.92 MiB	6.56 MiB	+ 657.66 KiB
/wp-admin/options-discussion.php	0.308 s	0.292 s	-0.016 s	3.47 MiB	3.97 MiB	+ 511.7 KiB
/wp-admin/edit-comments.php	0.232 s	0.215 s	-0.017 s	3.49 MiB	4.01 MiB	+ 533.6 KiB
/	0.538 s	0.296 s	-0.242 s	3.47 MiB	3.63 MiB	+ 157.04 KiB
Average	0.435 s	0.394 s	-0.041 s	3.93 MiB	4.45 MiB	+ 529.67 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

Language		%	Lines of code	Comment lines	Files
	PHP	90.4%	112,276	38,010	685
	JavaScript	6.1%	7,626	920	45
	CSS	3.1%	3,799	85	17
	Java	0.2%	231	77	1
	Markdown	0.1%	108	0	2
	INI	0.1%	84	16	6
	SVG	0.1%	66	1	5
	XML	0.0%	57	4	1
Total			124,247	39,113	762

PHP Code Analysis | More results »

Lines of code	87,326
Total complexity	19,851
Median class complexity	15.0
Median method complexity	2.0
Most complex class	wsdl
Most complex function	W3TCL\Minify\JSMinPlus::parseTree()

Classes	583
Methods	5,009
Functions	77

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` 3

w3tc_cached_notices
w3tc_extensions_hooks
w3tc_state

PHP Error Log 37 lines

[10-Dec-2024 18:19:03 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:04 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:04 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:06 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:06 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:07 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:07 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:08 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:08 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:09 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:09 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:10 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:10 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:11 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:11 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:12 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:12 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:13 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:13 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:14 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:14 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:15 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:15 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:16 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:16 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:17 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:17 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:18 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:18 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:19 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:20 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:20 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:21 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:21 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:22 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:22 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138
[10-Dec-2024 18:19:33 UTC] PHP Deprecated:  str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /wp-content/plugins/w3-total-cache/Generic_Plugin_Admin.php on line 1138

W3 Total Cache 2.8.1

Summary

Pages 20

Plugins ‹ Test site — WordPress

Performance

Performance → Feature Showcase

Performance → General Settings

Performance → Page Cache

Performance → Minify

Performance → Database Cache

Performance → Object Cache

Performance → Browser Cache

Performance → Cache Groups

Performance → CDN

Performance → Support

Performance → Google PageSpeed

Performance → User Experience

Performance → Install

Performance → Setup Guide

Performance → About

Performance → Extensions

Performance → Statistics

Test site – Just another WordPress site

Benchmark

Code Statistics

PHP Code Analysis | More results »

Additions

Options wp_options 3

PHP Error Log 37 lines

Options `wp_options` 3