6 string references to 'system.performance'

AjaxResponseAttachmentsProcessor::__construct in core/lib/Drupal/Core/Ajax/AjaxResponseAttachmentsProcessor.php: Constructs an AjaxResponseAttachmentsProcessor object.
Fast404ExceptionHtmlSubscriber::on404 in core/lib/Drupal/Core/EventSubscriber/Fast404ExceptionHtmlSubscriber.php: Handles a 404 error for HTML.
Fast404ExceptionHtmlSubscriber::onConfigSave in core/lib/Drupal/Core/EventSubscriber/Fast404ExceptionHtmlSubscriber.php: Invalidates 4xx-response cache tag if fast 404 config is changed.
FinishResponseSubscriber::__construct in core/lib/Drupal/Core/EventSubscriber/FinishResponseSubscriber.php: Constructs a FinishResponseSubscriber object.
HtmlResponseAttachmentsProcessor::__construct in core/lib/Drupal/Core/Render/HtmlResponseAttachmentsProcessor.php: Constructs a HtmlResponseAttachmentsProcessor object.
PerformanceForm::getEditableConfigNames in core/modules/system/src/Form/PerformanceForm.php: Gets the configuration names that will be editable.