WP REST Cache 2026.1.3
Does WP REST Cache work with WordPress 6.9.4 and PHP 8.1.12? A smoke test was performed on .
Summary
Errors
| 23 | PHP warnings |
| No JavaScript exceptions | |
| All test pages loaded successfully | |
| No resource errors |
Performance
Memory usage: 152.11 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 | 6.9.4 |
|---|---|
| PHP version | 8.1.12 |
| MySQL version | 10.6.10 |
| PHP memory limit | 512M |
Plugin Info
| Last updated | |
|---|---|
| Active installs | 10,000+ |
| WordPress.org page | https://wordpress.org/plugins/wp-rest-cache/ |
| Badges |
|
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=b787d77d46 |
| Aspect | after-activation |
| HTTP status | 200 |
| Load time | 0.417 s |
| Memory usage | 3.93 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 | 0.284 s |
| Memory usage | 3.88 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 | 0.267 s |
| Memory usage | 3.85 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 | 0.282 s |
| Memory usage | 3.86 MiB |
| JS errors | None |
| Resource errors | None |
Test site – Just another WordPress site
| URL | / |
|---|---|
| Aspect | front-page |
| HTTP status | 200 |
| Load time | 0.198 s |
| Memory usage | 4.21 MiB |
| JS errors | None |
| Resource errors | None |
Benchmark
| URL | Load time | Memory usage | ||||
|---|---|---|---|---|---|---|
| Inactive | Active | Change | Inactive | Active | Change | |
| /wp-admin/index.php | 0.426 s | 0.371 s | -0.055 s | 3.78 MiB | 3.92 MiB | + 150.68 KiB |
| /wp-admin/edit.php | 0.377 s | 0.416 s | +0.039 s | 3.78 MiB | 3.98 MiB | + 199.25 KiB |
| /wp-admin/post-new.php | 0.871 s | 0.766 s | -0.105 s | 6.31 MiB | 6.52 MiB | + 213.3 KiB |
| /wp-admin/upload.php | 0.547 s | 0.424 s | -0.123 s | 3.74 MiB | 3.86 MiB | + 127.44 KiB |
| /wp-admin/options-writing.php | 0.337 s | 0.324 s | -0.013 s | 3.71 MiB | 3.84 MiB | + 131.43 KiB |
| /wp-admin/media-new.php | 0.501 s | 0.360 s | -0.141 s | 3.7 MiB | 3.84 MiB | + 139.63 KiB |
| /wp-admin/edit-tags.php?taxonomy=category | 0.322 s | 0.463 s | +0.141 s | 3.72 MiB | 3.86 MiB | + 150.3 KiB |
| /wp-admin/post-new.php?post_type=page | 0.714 s | 0.660 s | -0.054 s | 6.3 MiB | 6.5 MiB | + 205.26 KiB |
| /wp-admin/options-discussion.php | 0.339 s | 0.352 s | +0.013 s | 3.71 MiB | 3.84 MiB | + 127.93 KiB |
| /wp-admin/edit-comments.php | 0.324 s | 0.336 s | +0.012 s | 3.74 MiB | 3.86 MiB | + 127.43 KiB |
| / | 0.285 s | 0.194 s | -0.091 s | 4.11 MiB | 4.21 MiB | + 100.59 KiB |
| Average | 0.458 s | 0.424 s | -0.034 s | 4.24 MiB | 4.38 MiB | + 152.11 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 | 92.5% | 2,570 | 1,961 | 26 | |
| Markdown | 7.3% | 203 | 0 | 1 | |
| CSS | 0.1% | 4 | 0 | 1 | |
| Total | 2,777 | 1,961 | 28 | ||
PHP Code Analysis | More results »
| Lines of code | 2,101 |
|---|---|
| Total complexity | 480 |
| Median class complexity | 7.5 |
| Median method complexity | 2.0 |
| Most complex class | WP_Rest_Cache_Plugin\Includes\Caching\Caching |
| Most complex function | WP_Rest_Cache_Plugin\Includes\API\Endpoint_Api::skip_caching() |
| Classes | 16 |
|---|---|
| Methods | 140 |
| 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 8
- 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_disallowed_endpoints
- wp_rest_cache_item_allowed_endpoints
- wp_rest_cache_rest_prefix
- wp_rest_cache_uncached_parameters
PHP Error Log 23 lines
[12-Mar-2026 12:57:25 UTC] PHP Warning: copy(/wp-content/mu-plugins/wp-rest-cache.php): Failed to open stream: Permission denied in /wp-admin/includes/class-wp-filesystem-direct.php on line 309
[12-Mar-2026 12:57:25 UTC] PHP Warning: copy(/wp-content/mu-plugins/wp-rest-cache.php): Failed to open stream: Permission denied in /wp-admin/includes/class-wp-filesystem-direct.php on line 309
[12-Mar-2026 12:57:26 UTC] PHP Warning: copy(/wp-content/mu-plugins/wp-rest-cache.php): Failed to open stream: Permission denied in /wp-admin/includes/class-wp-filesystem-direct.php on line 309
[12-Mar-2026 12:57:27 UTC] PHP Warning: copy(/wp-content/mu-plugins/wp-rest-cache.php): Failed to open stream: Permission denied in /wp-admin/includes/class-wp-filesystem-direct.php on line 309
[12-Mar-2026 12:57:28 UTC] PHP Warning: copy(/wp-content/mu-plugins/wp-rest-cache.php): Failed to open stream: Permission denied in /wp-admin/includes/class-wp-filesystem-direct.php on line 309
[12-Mar-2026 12:57:29 UTC] PHP Warning: copy(/wp-content/mu-plugins/wp-rest-cache.php): Failed to open stream: Permission denied in /wp-admin/includes/class-wp-filesystem-direct.php on line 309
[12-Mar-2026 12:57:31 UTC] PHP Warning: copy(/wp-content/mu-plugins/wp-rest-cache.php): Failed to open stream: Permission denied in /wp-admin/includes/class-wp-filesystem-direct.php on line 309
[12-Mar-2026 12:57:31 UTC] PHP Warning: copy(/wp-content/mu-plugins/wp-rest-cache.php): Failed to open stream: Permission denied in /wp-admin/includes/class-wp-filesystem-direct.php on line 309
[12-Mar-2026 12:57:31 UTC] PHP Warning: copy(/wp-content/mu-plugins/wp-rest-cache.php): Failed to open stream: Permission denied in /wp-admin/includes/class-wp-filesystem-direct.php on line 309
[12-Mar-2026 12:57:31 UTC] PHP Warning: copy(/wp-content/mu-plugins/wp-rest-cache.php): Failed to open stream: Permission denied in /wp-admin/includes/class-wp-filesystem-direct.php on line 309
[12-Mar-2026 12:57:34 UTC] PHP Warning: copy(/wp-content/mu-plugins/wp-rest-cache.php): Failed to open stream: Permission denied in /wp-admin/includes/class-wp-filesystem-direct.php on line 309
[12-Mar-2026 12:57:34 UTC] PHP Warning: copy(/wp-content/mu-plugins/wp-rest-cache.php): Failed to open stream: Permission denied in /wp-admin/includes/class-wp-filesystem-direct.php on line 309
[12-Mar-2026 12:57:34 UTC] PHP Warning: copy(/wp-content/mu-plugins/wp-rest-cache.php): Failed to open stream: Permission denied in /wp-admin/includes/class-wp-filesystem-direct.php on line 309
[12-Mar-2026 12:57:34 UTC] PHP Warning: copy(/wp-content/mu-plugins/wp-rest-cache.php): Failed to open stream: Permission denied in /wp-admin/includes/class-wp-filesystem-direct.php on line 309
[12-Mar-2026 12:57:35 UTC] PHP Warning: copy(/wp-content/mu-plugins/wp-rest-cache.php): Failed to open stream: Permission denied in /wp-admin/includes/class-wp-filesystem-direct.php on line 309
[12-Mar-2026 12:57:35 UTC] PHP Warning: copy(/wp-content/mu-plugins/wp-rest-cache.php): Failed to open stream: Permission denied in /wp-admin/includes/class-wp-filesystem-direct.php on line 309
[12-Mar-2026 12:57:36 UTC] PHP Warning: copy(/wp-content/mu-plugins/wp-rest-cache.php): Failed to open stream: Permission denied in /wp-admin/includes/class-wp-filesystem-direct.php on line 309
[12-Mar-2026 12:57:38 UTC] PHP Warning: copy(/wp-content/mu-plugins/wp-rest-cache.php): Failed to open stream: Permission denied in /wp-admin/includes/class-wp-filesystem-direct.php on line 309
[12-Mar-2026 12:57:38 UTC] PHP Warning: copy(/wp-content/mu-plugins/wp-rest-cache.php): Failed to open stream: Permission denied in /wp-admin/includes/class-wp-filesystem-direct.php on line 309
[12-Mar-2026 12:57:38 UTC] PHP Warning: copy(/wp-content/mu-plugins/wp-rest-cache.php): Failed to open stream: Permission denied in /wp-admin/includes/class-wp-filesystem-direct.php on line 309
[12-Mar-2026 12:57:39 UTC] PHP Warning: copy(/wp-content/mu-plugins/wp-rest-cache.php): Failed to open stream: Permission denied in /wp-admin/includes/class-wp-filesystem-direct.php on line 309
[12-Mar-2026 12:57:39 UTC] PHP Warning: copy(/wp-content/mu-plugins/wp-rest-cache.php): Failed to open stream: Permission denied in /wp-admin/includes/class-wp-filesystem-direct.php on line 309
[12-Mar-2026 12:57:40 UTC] PHP Warning: copy(/wp-content/mu-plugins/wp-rest-cache.php): Failed to open stream: Permission denied in /wp-admin/includes/class-wp-filesystem-direct.php on line 309