Report - WP REST Cache 2021.3.0

Does WP REST Cache work with WordPress 5.8.1 and PHP 7.4.8? A smoke test was performed on 2021-09-10 06:07:41 UTC.

Summary

Errors

1	Database errors
	No JavaScript exceptions
	All test pages loaded successfully
	No resource errors

Performance

Memory usage: 90.48 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	5.8.1
PHP version	7.4.8
MySQL version	8.0.21
PHP memory limit	256M

Plugin Info

Last updated	2026-07-25T08:01:00+00:00
Active installs	10,000+
WordPress.org page	https://wordpress.org/plugins/wp-rest-cache/
Badges	Get badge code

Pages 5

Plugins ‹ Test site — WordPress

URL	/wp-admin/plugins.php?plugin_status=all&paged=1&s
Requested URL	/wp-admin/plugins.php?action=activate&plugin=wp-rest-cache%2Fwp-rest-cache.php&plugin_status=all&paged=1&s&_wpnonce=80ee7a106d
Aspect	after-activation
HTTP status	200
Load time	0.901 s
Memory usage	3.86 MiB
JS errors	None
Resource errors	None

Settings → WP REST Cache

URL	/wp-admin/options-general.php?page=wp-rest-cache
Aspect	menu-item
HTTP status	200
Load time	0.277 s
Memory usage	3.16 MiB
JS errors	None
Resource errors	None

Settings → WP REST Cache → Endpoint API Caches

URL	/wp-admin/options-general.php?page=wp-rest-cache&sub=endpoint-api
Aspect	menu-item-tab
HTTP status	200
Load time	0.143 s
Memory usage	3.11 MiB
JS errors	None
Resource errors	None

Settings → WP REST Cache → Clear Caches

URL	/wp-admin/options-general.php?page=wp-rest-cache&sub=clear-cache
Aspect	menu-item-tab
HTTP status	200
Load time	0.145 s
Memory usage	3.13 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	2.98 MiB
JS errors	None
Resource errors	None

Benchmark

URL	Load time			Memory usage
URL	Inactive	Active	Change	Inactive	Active	Change
/wp-admin/index.php	0.327 s	0.263 s	-0.064 s	3.08 MiB	3.17 MiB	+ 90.61 KiB
/wp-admin/edit.php	0.169 s	0.182 s	+0.013 s	3.11 MiB	3.26 MiB	+ 154.61 KiB
/wp-admin/post-new.php	1.067 s	1.106 s	+0.039 s	5.27 MiB	5.37 MiB	+ 102.17 KiB
/wp-admin/upload.php	0.534 s	0.305 s	-0.229 s	3.03 MiB	3.11 MiB	+ 81.73 KiB
/wp-admin/options-writing.php	0.159 s	0.136 s	-0.023 s	3.02 MiB	3.09 MiB	+ 65.71 KiB
/wp-admin/media-new.php	0.245 s	0.179 s	-0.066 s	3.01 MiB	3.09 MiB	+ 81.9 KiB
/wp-admin/edit-tags.php?taxonomy=category	0.180 s	0.168 s	-0.012 s	3.04 MiB	3.12 MiB	+ 82.84 KiB
/wp-admin/post-new.php?post_type=page	0.892 s	1.226 s	+0.334 s	5.26 MiB	5.35 MiB	+ 95.99 KiB
/wp-admin/options-discussion.php	0.214 s	0.258 s	+0.044 s	3 MiB	3.08 MiB	+ 82.23 KiB
/wp-admin/edit-comments.php	0.198 s	0.258 s	+0.060 s	3.04 MiB	3.12 MiB	+ 81.72 KiB
/	0.290 s	0.257 s	-0.033 s	2.91 MiB	2.98 MiB	+ 75.73 KiB
Average	0.389 s	0.394 s	+0.006 s	3.43 MiB	3.52 MiB	+ 90.48 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	99.8%	2,003	1,458	25
	CSS	0.2%	4	0	1
Total			2,007	1,458	26

PHP Code Analysis | More results »

Lines of code	1,637
Total complexity	361
Median class complexity	7.0
Median method complexity	2.0
Most complex class	WP_Rest_Cache_Plugin\Includes\Caching\Caching
Most complex function	WP_Rest_Cache_Plugin\Includes\Caching\Caching::process_recursive_cache_relations()

Classes	15
Methods	116
Functions	0

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 2

wp_wrc_caches
wp_wrc_relations

Options `wp_options` 7

wp_rest_cache_allowed_endpoints
wp_rest_cache_allowed_request_methods
wp_rest_cache_cacheable_request_headers
wp_rest_cache_database_version
wp_rest_cache_item_allowed_endpoints
wp_rest_cache_rest_prefix
wp_rest_cache_uncached_parameters

PHP Error Log 1 lines

[10-Sep-2021 06:07:56 UTC] WordPress database error Table 'wordpress.wp_wrc_relations' doesn't exist for query ALTER TABLE `wp_wrc_relations` DROP INDEX `object`; made by require_once('wp-admin/admin.php'), require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), WP_Hook->do_action, WP_Hook->apply_filters, WP_Rest_Cache_Plugin\Includes\Caching\Caching->update_database_structure

WP REST Cache 2021.3.0