In pages there is this decoration in our demo https://git.magnolia-cms.com/projects/ENTERPRISE/repos/text-classification/browse/pages-content-tags-integration/src/main/resources/pages-content-tags-integration/decorations/pages-app/apps/pages-app.subApps.browser.yaml#55

Draw that column takes a lot of time. It can happens with other column definitions and in other applications, for example similar decoration in Assets app. More information https://jira.magnolia-cms.com/browse/DEV-1718.

Introduce empty data source for read-only, this will allow not to have to deal with styling changes.

This uses a component. A lighter approach is to use pure HTML with applied styles, but the above should suffice since that is the most contributing factor of performance drop. We'll create a new one if this doesn't fix it.