refreshAcl in Authentication plugin slows down all adminhtml requests

[ilnytskyi]

Preconditions and environment

• Magento version 2.4.7+
• Plugin Magento\Backend\App\Action\Plugin\Authentication enabled
• Have 17000+ rules in from in Magento\Authorization\Model\Acl\Loader\Rule::getRulesArray

Steps to reproduce

1. Perform any adminhtml requests.
2. See that Magento\Backend\App\Action\Plugin\Authentication::aroundDispatch calls the $this->_auth->getAuthStorage()->refreshAcl(); line https://github.com/magento/magento2/blame/2.4-develop/app/code/Magento/Backend/App/Action/Plugin/Authentication.php#L144
3. The call goes till the Magento\Authorization\Model\Acl\Loader\Rule::applyPermissionsAccordingToRules that adds about 200ms to total response time.

Expected result

1. Plugin Authentication::aroundDispatch does not slow down admin requests

Actual result

1. Plugin Authentication::aroundDispatch slows down admin requests

Additional information

Unfortunately it's unclear why this plugin is needed or why it triggers refreshAcl via $this->_auth->getAuthStorage()->refreshAcl();
The code added many years ago probably just as migration from Magento 1.

Release note

Fixed 200ms performance degradation in adminhtml area caused by Magento\Backend\App\Action\Plugin\Authentication::aroundDispatch plugin.

Triage and priority

• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

[m2-assistant]

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[MagePsycho]

Can this be safely removed?

[m2-assistant]

Hi @engcom-Hotel. Thank you for working on this issue.
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[engcom-Hotel]

Hello @ilnytskyi,

Thanks for the report and collaboration!

We have tried to reproduce this issue in the latest 2.4-develop branch and php-spz profiler. We have profiled product listing page, which shows refreshAcl call 1 time. Please refer to the below screenshot for the reference:

Please let us know if we have missed anthing.

Thanks

[ilnytskyi]

@engcom-Hotel

Please profile adminhtml area, e.g. main dashboard page.
Preconditions: 17K rules.
It can be achieved via many admin users along with many roles have different ACL rights.