So ... you're preprocessing the filesystem's contents into another file and/or keeping it in memory >Didgets uses the same key-value stores for attaching metad

So ... you're preprocessing the filesystem's contents into another file and/or keeping it in memory >Didgets uses the same key-value stores for attaching metadata tags to each file as we use to create columns in relational database tables. Finding files with certain tags is extremely fast as is just finding files of a certain type (e.g. documents or photos). Just like I said You are not exceeding the performance of the filesystem, you're hiding the filesystem behind your preprocessed abstraction Like locate does on *nix (https://en.wikipedia.org/wiki/Locate_(Unix) https://en.wikipedia.org/wiki/Locate_(Unix))