A version of dd writen by Tapani Lindgren <nispa@cs.hut.fi> which uses two processes to overlap reads and writes to increase throughput.
Placed here as an interesting example that is hard to find on the net now.
Tapani Lindgren <nispa@cs.hut.fi>
Non commercial BSD style license?
Permission granted to distribute, use and modify this code for uncommercial purposes, provided that this copyright notice is not changed.