Possible to cache in shared memory?

[jaydiablo]

I noticed that this package caches the secrets it fetches from AWS in a temporary file: https://github.com/brefphp/secrets-loader/blob/main/src/Secrets.php#L69

From your testing, is it possible to leverage something like APCu to cache these in memory rather than on disk? If so, would this be something that could be configurable in the future for organizations that don't want secrets stored on disk?