Tue, 10 Oct 2017 19:48:29 +0200 wenzelm cycle check with informative error;
Tue, 10 Oct 2017 19:23:03 +0200 wenzelm tuned: each session has at most one defining entry;
Tue, 10 Oct 2017 13:46:12 +0200 wenzelm more operations;
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -3 +3 +10 +30 +100 +300 +1000 +3000 tip