Performance Plugins Need to Keep Pace With WordPress

By Devin Walker on August 21, 2026

WordPress 7.1 was released on August 19. Soon after, some sites running WP Rocket encountered a fatal error.

The problem wasn’t discovered on release day. It had been reported publicly on July 6, while WordPress 7.1 was still in alpha.

The report included reproduction steps, identified the source of the error, and proposed a one-line fix. Then… more than six weeks passed.

The 45-day timeline

July 6, 2026

The fatal error was reported publicly with reproduction steps, the source of the problem, and a proposed one-line fix.

July 15, 2026

WordPress 7.1 Beta 1 was released, beginning the public beta-testing period.

August 5, 2026

WordPress 7.1 entered release-candidate testing. The compatibility issue was still unresolved.

August 19, 2026

WordPress 7.1 was released. Sites with affected WP Rocket configurations began encountering the fatal error.

August 20, 2026

WP Rocket 3.23.2.2 shipped the fix, 45 days after the original report.

During that period, WordPress 7.1 moved through four beta releases and four release candidates according to the release schedule. WP Rocket also shipped four plugin updates before the compatibility fix arrived.

That timeline raises a fair question about what WordPress site owners should expect from the plugins they depend on.

Compatibility is part of performance

Bugs happen in every software project, including ours. Reports against an alpha release can be incomplete, limited to one environment, or affected by changes before the final release. Plugin maintainers have to investigate and prioritize them carefully.

This report was unusually specific. It identified the exact function receiving the wrong data type, provided steps to reproduce the fatal error, and included a proposed fix.

There was also time to test it. WordPress 7.1’s public release cycle included beta releases beginning July 15 and release candidates beginning August 5.

Performance plugins work deep inside WordPress. They change how pages are cached, scripts are loaded, CSS is delivered, and assets are served. That makes compatibility work especially important.

A faster site isn’t much help if a normal WordPress update can take it offline.

This wasn’t a disclosed security vulnerability. It was a compatibility failure that affected site availability in certain configurations. That distinction matters technically, but the result for an affected site owner was still serious.

How Jetpack handles serious security reports

The WP Rocket issue wasn’t reported as a security vulnerability, so it wouldn’t be accurate to compare it directly with an exploit. Our security policies are still a useful example of the standard we’ve set for handling serious reports.

Jetpack has a public security policy and participates in Automattic’s HackerOne bug bounty program. Internally, our process covers reports received through HackerOne, GitHub, and our own internal Automattic teams.

Triage the report. We assess whether the issue can be exploited, which versions are affected, how many sites may be exposed, and whether WordPress.com is affected.
Bring in the right teams. Jetpack Engineering coordinates with Automattic’s security team, and with support, communications, legal, hosting partners, or WordPress.org when the situation calls for it.
Match the release to the severity. Critical vulnerabilities call for a hotfix as soon as possible and backports to affected releases. High-severity issues get a point release. Lower-risk issues are still assigned a clear release path.
Review the fix. Security patches receive security review. Testing can be expedited when the risk is urgent, but it isn’t skipped.
Communicate and learn. Serious incidents have clear owners for engineering, user communication, and support. Afterward, we review what happened and what should change.

No policy makes a software team perfect. It does make the expectations clear. A credible report needs an owner, a severity decision, a release path, and follow-through.

This is a good time to review your performance setup

WordPress performance setups tend to grow over time. A caching plugin gets added first. Then comes image optimization, a CDN, script deferral, Critical CSS, and another tool to measure the results.

Eventually, several plugins can be changing the same parts of a site.

If you’re using WP Rocket primarily for caching and front-end optimization, Jetpack Boost covers many of those same jobs:

Page caching
Critical CSS
Deferring non-essential JavaScript
Combining and minifying CSS and JavaScript
Image optimization through Jetpack’s global CDN
Built-in performance scores

These features can be enabled individually, which makes it easier to understand what each change is doing. The free version includes page caching, manual Critical CSS generation, JavaScript deferral, Image CDN, and CSS and JavaScript concatenation.

Don’t want everything Jetpack has to offer? No problem. Jetpack Boost is also a separate plugin. You don’t need to install the main Jetpack plugin to use it.

Jetpack Boost dashboard with page caching, CSS optimization, JavaScript deferral, and Image CDN settings.

How to switch from WP Rocket to Jetpack Boost

Before changing performance plugins, back up your site or test the change on a staging site.

If your site is already affected by the WordPress 7.1 fatal error, update WP Rocket to version 3.23.2.2 first. Once the site is working again:

Record your current performance results so you have a baseline.
Deactivate WP Rocket and clear any remaining server or CDN caches.
Install and activate Jetpack Boost.
Enable the performance modules one at a time.
Test your homepage, posts, forms, search, login, checkout, and other important flows after each change.
Compare the results with your original baseline.

Avoid enabling the same optimization in multiple plugins. Two tools trying to defer the same JavaScript or manage the same cache can create new compatibility problems.

Every WordPress site is different, so measure the result instead of assuming every optimization will help.

Plugin updates require trust

Site owners depend on plugin teams to follow WordPress development, test upcoming releases, and investigate credible compatibility reports before those releases reach production.

The WP Rocket issue isn’t about expecting software to be bug-free. It’s about what happens after a serious problem has already been reported and the proposed fix is known.

If this incident has you reconsidering WP Rocket, Jetpack Boost gives you a practical path to simplify your performance setup while keeping the optimizations your site needs.