[erlang-questions] interesting I/O bottleneck

[James Hague]

>Do you know if the input file names to the function contain
>atoms or are deep?

In my code the filenames are flat strings (no atoms, no nested lists).  If I
had known that filenames could be deep lists I would have taken advantage of
that, but I'm not currently.

Is there a reason that atoms are allowed in filenames? Why not just go with
iolists?