A bit more detail: we're already trying to take the most advantage of zipmaps, ziplists, etc, and I'm wondering whether these representations are already compressed, or are just serialized hashes and lists; does compression significantly reduce memory usage?

Also, does compression overhead at the app server layer get offset by lower network usage? [StackOverflow's experience](https://meta.stackexchange.com/questions/69164/does-stackoverflow-use-caching-and-if-so-how) suggests it does, any other opinions?

In brief, does it make sense - for both short and longer strings?