No, it doesn’t load anything extra on the front-end that would make the website slower. The only elements loaded are a CSS and JavaScript file that load only for the administrator (when you’re logged in, basically) when he manages the asset list. The plugin’s own assets which are meant to enhance the styling and functionality of Asset CleanUp Pro’s settings are also excluded from the whole list of manageable assets as they are not relevant for the unload and any page speed score.
