Idea for improving load speed of large NeoGeo ROMs.

[Jimmy-Z]

I'm wondering what we can do to optimize this, I'm guessing it's I/O bottlenecked, specifically reading ROM from microSD card, but it could also be the requirement of a swap file on SD card since we have limited RAM.

If it is the former, I think I have an idea for optimization, NeoGeo ROMs once had "decrypted C" or "non-encrypted C" variants (IIRC, likely in the Kawaks era), since the decryption stage could cost like tens of seconds, later the decryption algorithm got cleaned up and a lot faster, emulators dropped support for them, but this move actually had another drawback: encrypted C ROMs have higher entropy, i.e. they're way less compressible, makes the zipped ROM quite larger, since this counts for quite a large portion of the ROM, if we can get "decrypted C" support back, the ROMs could be quite smaller and load speed could potentially be improved.