This Comet Cache release candidate includes 2 new features, 4 bug fixes, 2 enhancements, ManageWP compatibility, and a completely rewritten Pro Plugin Updater (now using the built-in WordPress plugin update system). You can download and try out this release using the link below. Please report bugs and feedback on GitHub.

Comet Cache Pro testers: Don't forget that you can automatically receive Release Candidates by telling the Comet Cache Plugin Updater to check for Release Candidates in Comet Cache → Plugin Options → Update Credentials → Beta Program.


Lite: Comet Cache Lite v160908-RC

Pro: Comet Cache Pro v160908-RC (you must be logged into your account at to access this download)

Installation Instructions

  1. Deactivate and Delete any existing Comet Cache plugin via Dashboard → Plugins
  2. Download the release candidate using the link above
  3. Install the release candidate you downloaded by going to Dashboard → Plugins → Add New → Upload and selecting the downloaded zip file
  4. Activate Comet Cache

Changelog for Comet Cache v160908-RC (Release Candidate)

  • New Feature (Lite): The Clear Cache button is now available in the Admin Toolbar for the Lite version of Comet Cache.
  • New Feature (Pro): Comet Cache Pro is now fully compatible with WordPress Automatic Background Updates. If you enable automatic background updates for plugins, and you save valid Comet Cache Pro License Credentials in the Comet Cache Pro → Plugin Options → Update Credentials panel, you will automatically receive Pro plugin updates. Props @jaswsinc. See Issue #289.
  • Bug Fix: In some scenarios Comet Cache might produce a false-positive "Warning: mkdir(): File exists" message when checking if the cache directory exists. Comet Cache now calls clearstatcache() and uses file_exists() instead of is_dir() to help make this check more robust. See Issue #786.
  • Bug Fix: Fixed a bug where the Comet Cache PHP requirements check would fail and produce a fatal error when upgrading from a version of Comet Cache that did not require an extension that is now required by newer releases. This would occur when, for example, the required PHP mbstring extension was missing. Props @jaswsinc for finding the bug. See Issue #817.
  • Bug Fix: Fixed a bug where upgrading from v160521 would result in the Client-Side Cache option being reset to the default (disabled). If you enabled the Client-Side Cache at some point, now is a good time to double-check that it's still enabled. This bug fix also improves the reliability of all version upgrade routines that Comet Cache runs during upgrades. See Issue #807.
  • Compatibility / Bug Fix: The automatic Clear Cache routines that cleared the entire cache automatically whenever WordPress Dashboard → Settings → General was updated, were being too aggressive and not taking into consideration other plugins that might also be using the same options-general.php URL. As a result, the entire cache was being unnecessarily cleared when the settings for those other plugins were saved. Props to @futtta from Autoptimize for reporting. See Issue #825.
  • UI Enhancement: Adjusted option page font styles for WordPress v4.6 to better match existing style. See Issue #271.
  • ManageWP Compatibility (Pro): Comet Cache Pro is now compatible with ManageWP, a service that allows remote management of multiple WordPress sites. Comet Cache Pro Plugin Updates will now appear in the ManageWP dashboard and, assuming you have saved valid license credentials in Dashboard → Comet Cache Pro → Plugin Options → Update Credentials, you will be able to upgrade Comet Cache Pro remotely from the ManageWP Dashboard. Props @jaswsinc. See Issue #465.
  • Rewritten Pro Plugin Updater: The Comet Cache Pro Plugin Updater has been redesigned to use the built-in WordPress plugin updater system. When a Comet Cache Pro update is available, it now appears in the WordPress Updates section and in the Plugins list, like other WordPress plugins and can be updated normally like other WordPress plugins, as long as you have saved valid Comet Cache Pro license details in the new "Update Credentials" options panel. Props @jaswsinc. See Issue #272.
  • Code Style: The WP_CACHE line that gets inserted into the wp-config.php file to enable caching now follows the WordPress PHP Code Standards. Props @szepeviktor. See Issue #799.

Please note that when this version leaves beta and an official release is made, the WordPress Plugin Updater will automatically detect the new version on and ask you to upgrade (applies to Comet Cache Lite). If you're using Comet Cache Pro, please configure the Pro Plugin Updater (Dashboard → Comet Cache → Plugin Updater) so that you are notified when there is a new official release.

Please report bugs and feedback on GitHub.