Yes, I understood, but "mmap a file" that should be a database is not "easy", because now you can deal with segfaults and other weird things that are out the no

Yes, I understood, but "mmap a file" that should be a database is not "easy", because now you can deal with segfaults and other weird things that are out the normal playbook. Of course, depending on the other things of the list this is or not a major issue. Is more about how combining several ideas leads to a easy or complex implementation.