Scalability Pro v6.26.5 – Optimize WP Performance & Scalability

Last Update: July 24, 2026
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Overview

The Scalability Pro Plugin is the core WP Intense plugin to transform the speed and scalability of your WordPress site. It does so primarily by eliminating table scans and using index seeks instead. A highly scalable site will not slow down as your site gets bigger. Without Scalability Pro, you will likely see a degradation of performance on your website once you exceed 5000 products, orders or users.

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Status

  Plugin has been activated, access premium features.

Changelog

v6.26.5 - July 23, 2026

* Fixed the file cache handler initialising the WordPress filesystem on every request at plugins_loaded – on hosts where WordPress cannot write files directly (FTP/SSH credential hosts) this echoed the WordPress connection-details form into every page load, WP-CLI command, cron run and REST request. The filesystem is now initialised only when a cache method is actually used, and the credentials prompt has been removed entirely (if credential-less filesystem access is unavailable, file caching is simply reported as unavailable and callers fall back to other cache storage)
* Fixed a potential fatal error in the cache handler when the filesystem could not be initialised (cache methods now fail gracefully instead of calling methods on a null filesystem object)
* Fixed cache expiry never being detected on read – the expiry timestamp comparison compared a number against a date string, so expired cache files were still served until the cleanup cron removed them
* Thanks to @CraigM for reporting the filesystem initialisation issue with a superb writeup

Installation

  • Documentation: https://www.superspeedyplugins.com/kb/scalability-pro/getting-started/scalability-pro-installation-and-options/
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