Hi All, Regarding the Fannkuch Shootout Entry: If we are willing to specialize flop in the way shown on the wiki, another 8% can be gained by similarly specializing rotate: rotate 2 (x1:x2:xs) = x2:x1:xs rotate 3 (x1:x2:x3:xs) = x2:x3:x1:xs rotate 4 (x1:x2:x3:x4:xs) = x2:x3:x4:x1:xs rotate 5 (x1:x2:x3:x4:x5:xs) = x2:x3:x4:x5:x1:xs rotate 6 (x1:x2:x3:x4:x5:x:6:xs) = x2:x3:x4:x5:x:6:x1:xs rotate 7 (x1:x2:x3:x4:x5:x:6:x7:xs) = x2:x3:x4:x5:x:6:x7:x1:xs rotate 8 (x1:x2:x3:x4:x5:x:6:x7:x8:xs) = x2:x3:x4:x5:x:6:x7:x8:x1:xs rotate 9 (x1:x2:x3:x4:x5:x:6:x7:x8:x9:xs) = x2:x3:x4:x5:x: 6:x7:x8:x9:x1:xs rotate 10 (x1:x2:x3:x4:x5:x:6:x7:x8:x9:x10:xs) = x2:x3:x4:x5:x: 6:x7:x8:x9:x10:x1:xs rotate n (x:xs) = rot' n xs where rot' 1 xs = x:xs rot' n (x:xs) = x:rot' (n-1) xs Cheers, David -------------------------------- David F. Place mailto:d@vidplace.com