Proxy Cache Purge 5.8.1
Does Proxy Cache Purge work with WordPress 6.9.4 and PHP 8.1.12? A smoke test was performed on .
Summary
Errors
| 2 | PHP warnings |
| No JavaScript exceptions | |
| All test pages loaded successfully | |
| No resource errors |
Performance
Memory usage: 106.05 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 | 40,000+ |
| WordPress.org page | https://wordpress.org/plugins/varnish-http-purge/ |
| Badges |
|
Pages 6
Plugins ‹ Test site — WordPress
| URL | /wp-admin/plugins.php?plugin_status=all&paged=1&s |
|---|---|
| Requested URL | /wp-admin/plugins.php?action=activate&plugin=varnish-http-purge%2Fvarnish-http-purge.php&plugin_status=all&paged=1&s&_wpnonce=79cc739b23 |
| Aspect | after-activation |
| HTTP status | 200 |
| Load time | 0.455 s |
| Memory usage | 3.85 MiB |
| JS errors | None |
| Resource errors | None |
Proxy Cache
| URL | /wp-admin/admin.php?page=varnish-page |
|---|---|
| Aspect | menu-item |
| HTTP status | 200 |
| Load time | 0.302 s |
| Memory usage | 3.8 MiB |
| JS errors | None |
| Resource errors | None |
Proxy Cache → Check Caching
| URL | /wp-admin/admin.php?page=varnish-check-caching |
|---|---|
| Aspect | menu-item |
| HTTP status | 200 |
| Load time | 0.265 s |
| Memory usage | 3.8 MiB |
| JS errors | None |
| Resource errors | None |
Proxy Cache → Check Caching → Header Analysis
| URL | /wp-admin/admin.php?page=varnish-check-caching |
|---|---|
| Aspect | menu-item-tab |
| HTTP status | 200 |
| Load time | 0.262 s |
| Memory usage | 3.8 MiB |
| JS errors | None |
| Resource errors | None |
Proxy Cache → Get Cache Warming
| URL | /wp-admin/admin.php?page=vhp-cache-warming |
|---|---|
| Aspect | menu-item |
| HTTP status | 200 |
| Load time | 0.125 s |
| Memory usage | N/A |
| JS errors | None |
| Resource errors | None |
Test site – Just another WordPress site
| URL | / |
|---|---|
| Aspect | front-page |
| HTTP status | 200 |
| Load time | 0.229 s |
| Memory usage | 4.18 MiB |
| JS errors | None |
| Resource errors | None |
Benchmark
| URL | Load time | Memory usage | ||||
|---|---|---|---|---|---|---|
| Inactive | Active | Change | Inactive | Active | Change | |
| /wp-admin/index.php | 0.435 s | 0.491 s | +0.056 s | 3.78 MiB | 3.91 MiB | + 129.03 KiB |
| /wp-admin/edit.php | 0.366 s | 0.306 s | -0.060 s | 3.79 MiB | 3.91 MiB | + 121.22 KiB |
| /wp-admin/post-new.php | 0.856 s | 0.865 s | +0.009 s | 6.31 MiB | 6.44 MiB | + 130.81 KiB |
| /wp-admin/upload.php | 0.458 s | 0.424 s | -0.034 s | 3.74 MiB | 3.84 MiB | + 103.89 KiB |
| /wp-admin/options-writing.php | 0.347 s | 0.373 s | +0.026 s | 3.72 MiB | 3.8 MiB | + 87.88 KiB |
| /wp-admin/media-new.php | 0.519 s | 0.400 s | -0.119 s | 3.71 MiB | 3.8 MiB | + 96.08 KiB |
| /wp-admin/edit-tags.php?taxonomy=category | 0.330 s | 0.320 s | -0.010 s | 3.72 MiB | 3.84 MiB | + 126.75 KiB |
| /wp-admin/post-new.php?post_type=page | 0.737 s | 0.662 s | -0.075 s | 6.3 MiB | 6.43 MiB | + 128.31 KiB |
| /wp-admin/options-discussion.php | 0.338 s | 0.369 s | +0.031 s | 3.72 MiB | 3.8 MiB | + 84.38 KiB |
| /wp-admin/edit-comments.php | 0.331 s | 0.335 s | +0.004 s | 3.74 MiB | 3.84 MiB | + 103.88 KiB |
| / | 0.292 s | 0.181 s | -0.111 s | 4.12 MiB | 4.18 MiB | + 54.34 KiB |
| Average | 0.455 s | 0.430 s | -0.026 s | 4.24 MiB | 4.34 MiB | + 106.05 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 | 92.9% | 4,294 | 1,845 | 7 | |
| JSON | 6.6% | 306 | 0 | 3 | |
| CSS | 0.5% | 21 | 3 | 1 | |
| Total | 4,621 | 1,848 | 11 | ||
PHP Code Analysis | More results »
| Lines of code | 4,389 |
|---|---|
| Total complexity | 940 |
| Median class complexity | 230.0 |
| Median method complexity | 4.0 |
| Most complex class | VarnishPurger |
| Most complex function | VarnishPurger::purge_post() |
| Classes | 5 |
|---|---|
| Methods | 119 |
| Functions | 2 |
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 5
- vhp_varnish_debug
- vhp_varnish_devmode
- vhp_varnish_ip
- vhp_varnish_max_posts_before_all
- vhp_varnish_url
PHP Error Log 2 lines
[19-Mar-2026 10:28:43 UTC] PHP Warning: Cannot modify header information - headers already sent by (output started at /wp-admin/menu-header.php:175) in /wp-includes/pluggable.php on line 1531
[19-Mar-2026 10:28:43 UTC] PHP Warning: Cannot modify header information - headers already sent by (output started at /wp-admin/menu-header.php:175) in /wp-includes/pluggable.php on line 1534