This looks awesome to me. My application has GB of read-only objects that I cache in virtual memory. Unfortunately, Java does not have a way to exclude certain objects from garbage collection, so large numbers of read-only long-lived objects get processed for GC anyway and slow down the application.

I recall that Smalltalk back in the day had a save-to-perm feature in which objects could get moved to a section of VM that was not subject to GC. I wish Java had that.