Comment by kelnos

mmap() is useful for some narrow use-cases, I think, but error-handling is a huge pain. I don't want to have to deal with SIGBUS in my application.

I agree that the model of mmap() is amazing, though: being able to treat a file as just a range of bytes in memory, while letting the OS handle the fussy details, is incredibly useful. (It's just that the OS doesn't handle all of the fussy details, and that's a pain.)