Btreefs generates executable code at runtime to unpack btree nodes (evilpiepirate.org)
evilpiepirate.org/git/bcachefs.git/tree/…/bkey.c#…
evilpiepirate.org/git/bcachefs.git/tree/…/bkey.c#…
https://evilpiepirate.org/git/bcachefs.git/tree/fs/bcachefs/bkey.c#n727