Does anything change if you swap the first two rhss?
On Sun, Mar 28, 2010 at 1:28 AM, Roman Leshchinskiy <r...@cse.unsw.edu.au> wrote: > On 28/03/2010, at 09:47, Lennart Augustsson wrote: > >> It's important to switch from mod to rem. This can be done by a >> simple abstract interpretation. > > Also, changing the definition of rem from > > a `rem` b > | b == 0 = divZeroError > | a == minBound && b == (-1) = overflowError > | otherwise = a `remInt` b > > to > > a `rem` b > | b == 0 = divZeroError > | b == (-1) && a == minBound = overflowError > | otherwise = a `remInt` b > > speeds up the GHC version by about 20%. Figuring out why is left as an > exercise to the reader :-) > > Roman > > > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe > _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
