Thats 52.168 - 38.9 # => 13.268 mb of savings or 25% of all RAM usage. This is a non-trivial amount of memory to use. I've got some causes and some ideas, but I want some more eyes and some feedback before moving forwards. Memory Causes As far as I can tell there are two main culprits that are causing memory use. 1) Loading large JSON blob. Loading a 547 KB file into JSON and converting to a hash