How big is yours and why do you think you need to reduce its size?
I have a hash on disk that exceeds 42GB. I use a hash to avoid duplicates. Walking the hash through DBM::Deep
takes about 5x longer than the equivalent memory hash. Of course, I haven't tried it on one this big, so it's much likely worse.
There isn't any super tricky thing that "re-uses" strings via a pointer to that string.
Thanks. I was just wondering if Perl already did this for me. Since that's not the case, it might be worth a try.
Quantum Mechanics: The dreams stuff is made of