It seems to save a chunk of data every time I recompile my blueprints. And saves data about all of my blueprints all the time, because for some reason the editor wants recompile ones I haven’t made any changes to. Anyway, I turned off Auto Recompile Blueprints every time I start PIE and I’m manually recompiling the ones I actually do make changes to and now it’s keeping the editor both from saving that large amounts of data and has reduced the rate at which it increases in RAM usage over time.