[Twirrim]

The shared class cache was the thing I was thinking of, I think.

https://developer.ibm.com/tutorials/j-class-sharing-openj9/

Looks like maybe there is similar for OpenJDK & Oracle Java as of version 12 (I think it is?)

https://docs.oracle.com/en/java/javase/19/docs/specs/man/jav...