In order to determine which assets are used in which content elements, Neos needs to do a full like search through all properties of the Neos ContentRepository table.
For larger projects, having > 100.000 nodes, this can get awfully slow. A click on an asset in the media module can take a minute and more. Scanning for unused assets using the /flow media:removeunused command can last for days.
This package extracts used assets during the Elasticsearch indexing and replaces the expensive like search through a fast and effective Elasticsearch query.
$ composer require punktde/elastic-assetusageinnodes