WordPress Performance Team Proposes Adding Persistent Object Cache and Full Page Cache to Site Health Checks

In the near future, WordPress may be able to provide better caching recommendations for site owners. Performance team contributors are proposing two new Site Health checks for Persistent Object Cache and Full Page Cache. The modules have been tested inside the Performance Lab plugin and version 1.2.0 has them both in a state the team says is ready for merging into core.

Here is an example of what users might see on the Site Health screen if page caching is not detected:

The modules are extensible so hosting companies and developers can further customize the output that users see. Performance team contributor Manuel Rodriguez detailed a few ways to use the filters:

  • Hosts may want to replace the notes to recommend their preferred object caching solution.
  • Hosts may want to replace the original link to WordPress documentation with a link to  their own guide.
  • Hosts or site owners may want to bypass thresholds and force suggestions, or filter them to determine whether to suggest the use of a persistent object cache.
  • Developers can filter the threshold below which a response time is considered good.

The team is targeting WordPress 6.1 for merging the modules into core. The proposed modules are just two of many more planned enhancements and improvements to Site Health audits and reports.

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4 responses to “WordPress Performance Team Proposes Adding Persistent Object Cache and Full Page Cache to Site Health Checks”

  1. Hosting companies should not have the ability to fiddle with site health checks.

    • If you are on a shared hosting server that is overloaded, you might experience slowness in pages. This advice might urge you to install a plugin like WP Super Cache, which will cache pages for users that are not logged in.

      An object cache module here might notice if Memcached or other object caches are available. You can than be adviced to install a plugin that will make use of this. On a website that is data heavy and uses lots of database requests you might notice a speed improvement. This advice I have mixed feelings about, because object caches can sometimes cause problems by showing old data.

    • Hi Sally! The intention here is that you can use the information provided by these checks to identify and address any issues that could be affecting your site’s performance. For example, if the Page caching check does not detect any page caching and notes that your server seems slow, you may want to consider installing a page caching plugin and then testing your site’s speed to see if it has improved.

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