Peter Hercek wrote: > MS cl.exe version 13.10.3077 (options /G7 /MD) And I had cl options wrong too - I need to start to optimize not only to set the optimization target. /G7 /MD -> 1.109; 1.125; 1.125 /Ox /G7 /MD -> 0.922; 0.984; 0.984 Still it does not change the results too much. Peter.