That's one more third party dependency down.
Not only are two hashing algorithms redundant, there was also a large size discrepancy: SuperFastHash is 3 kb of source code while xxhash is 120kb and generally extremely awful code.
It was easy to make a choice here. None of the use cases require this kind of performance tweaking, the longest hashed block of data is a 768 byte palette.
Unfortunately this means that looking up ID 0 can be a bit more costly than the rest because all ID-less entries in RFF files also use 0.
For other file types -1 is used.
It's still not active but now should produce correct results when working inside the file system.
What it is missing is a file scanner that picks the data it needs to process.
- disabled the user maps menu because it is hopelessly dependent on functionality that cannot be fixed. Better wait until the menu refactor to do it right - it'd be a waste of time fixing the current menus.