SiteLint Audits Platform has no impact on the site performance. When we think about the performance it relates to loading and running. By default, Audits is loading with 3.5 seconds delay so that it gives an opportunity to first load your content in high priority. All audits are running during a browser’s idle periods (requestIdleCallback), either at the end of a frame or when the user is inactive. Because the audits are performed in the browser’s free time, the performance of the site is not impacted. Also, audits aren’t running every time the user lands on your site. It runs only when the content changes.