Speed the read write speeds of every server and workstation at work by introducing on the fly compression. I hypothised it would work because we had a surprising amount of idle cpu and even where we didn’t a lot of the clock cycles were waiting for IO. Had to design some benchmarks, run on test systems, do a blue field deployment on a few prod servers, etc, but it was really rewarding to go from idea to implementation. It’s was actually noticble to users for start up time too! It lead to a more aggressive compression on some backups that ended up delaying the need for hardware purchases too.