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W3 Total Cache 2.9.1

Does W3 Total Cache work with WordPress 6.9.1 and PHP 8.1.12? A smoke test was performed on 2026-02-03 18:42:51 UTC.

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

URL	Load time			Memory usage
	Inactive	Active	Change	Inactive	Active	Change
/wp-admin/index.php	0.445 s	0.513 s	+0.068 s	3.78 MiB	4.42 MiB	+ 659.28 KiB
/wp-admin/edit.php	0.362 s	0.325 s	-0.037 s	3.78 MiB	4.45 MiB	+ 688.08 KiB
/wp-admin/post-new.php	0.869 s	0.847 s	-0.022 s	6.31 MiB	6.98 MiB	+ 689.3 KiB
/wp-admin/upload.php	0.705 s	0.446 s	-0.259 s	3.74 MiB	4.37 MiB	+ 649.27 KiB
/wp-admin/options-writing.php	0.335 s	0.325 s	-0.010 s	3.71 MiB	4.26 MiB	+ 566.55 KiB
/wp-admin/media-new.php	0.489 s	0.402 s	-0.087 s	3.7 MiB	4.25 MiB	+ 564.91 KiB
/wp-admin/edit-tags.php?taxonomy=category	0.477 s	0.478 s	+0.001 s	3.72 MiB	4.32 MiB	+ 616.18 KiB
/wp-admin/post-new.php?post_type=page	0.723 s	0.662 s	-0.061 s	6.3 MiB	6.98 MiB	+ 698.73 KiB
/wp-admin/options-discussion.php	0.393 s	0.477 s	+0.084 s	3.71 MiB	4.3 MiB	+ 596.35 KiB
/wp-admin/edit-comments.php	0.339 s	0.350 s	+0.011 s	3.73 MiB	4.34 MiB	+ 625.02 KiB
/	0.277 s	0.187 s	-0.090 s	4.11 MiB	4.31 MiB	+ 207.01 KiB
Average	0.492 s	0.456 s	-0.037 s	4.23 MiB	4.82 MiB	+ 596.43 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.

Language		%	Lines of code	Comment lines	Files
	PHP	90.2%	115,074	52,945	632
	JavaScript	6.3%	7,976	1,163	40
	CSS	3.1%	4,019	93	19
	Java	0.2%	231	77	1
	Markdown	0.1%	147	0	4
	INI	0.1%	84	16	6
	XML	0.0%	57	4	1
	HTML	0.0%	7	0	1
	SVG	0.0%	4	0	4
Total			127,599	54,298	708

PHP Code Analysis | More results »

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 6

• w3tc_cached_notices
• w3tc_extensions_hooks
• w3tc_install_date
• w3tc_post_update_admin_tasks_ran_versions
• w3tc_post_update_generic_tasks_ran_versions
• w3tc_state

PHP Error Log 6 lines

[03-Feb-2026 18:43:09 UTC] W3 Total Cache environment exception: Edit file <strong>/wp-config.php</strong> and add next lines:<textarea style="height: 100px; width: 100%;">/** Enable W3 Total Cache */
define(&#039;WP_CACHE&#039;, true); // Added by W3 Total Cache
</textarea><br />
[03-Feb-2026 18:43:09 UTC] W3 Total Cache environment exception: Edit file <strong>/wp-config.php</strong> and add next lines:<textarea style="height: 100px; width: 100%;">/** Enable W3 Total Cache */
define(&#039;WP_CACHE&#039;, true); // Added by W3 Total Cache
</textarea><br />

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