File-entry-cache is a super simple cache for file metadata, useful for process that work on a given series of files and that only need to repeat the job on the changed ones since the previous run of the process.

The module grew from a need for a super simple and dumb in-memory cache with optional disk persistence for a script to beautify files with "esformatter" only processing files that had changed since last run. Such use case need "fileSize" and "modificationTime" of the files tracked in a simple key/value storage.