Sun, 10 Jan 2010 20:14:21 +0100 wenzelm iterators for ranges of commands/starts -- avoid extra array per document;
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -1 +1 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip