A sick idea - mmapped file output

[Bourne-again Superuser]

Linus Torvalds said:
> 
> Comparing the mmap() with a stdio-based approach is unfair.  You should
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> at least try with direct write() calls.  If the common case is _really_
> short writes, you could go half-way, with a really simple buffering
> scheme rather than stdio (expose the buffer or similar).
> 
I agree.

John