I've had great success in Java of using the built in serializing functionality to generate binary blobs and write those to .bin files. Nothing wrong with havin

I've had great success in Java of using the built in serializing functionality to generate binary blobs and write those to .bin files. Nothing wrong with having a multi-GB HashMap or something that you have to load into RAM in startup. It just depends what you're doing. It's certainly cheaper than recomputing that HashMap.