tolf and detab

[bearophile]

Andrei Alexandrescu:
> I think at the end of the day, regardless the relative possibilities of 
> file reading in the two languages, we should be faster than Python when 
> allocating one new string per line.

For now I suggest you to aim to be just about as fast as Python in this task :-) Beating Python significantly on this task is probably not easy.
(Later someday I'd also like D AAs to become about as fast as Python dicts.)

Bye,
bearophile