Re: isSpace is too slow

ndmitchell:

Hi,

I'm running a particular benchmark which calls isSpace a lot (basically wc -w). There are three ways to do the underlying space comparison - using the Haskell Data.Char.isSpace, using the C isspace, or using the C iswspace:

isspace: 0.375 iswspace: 0.400 Char.isSpace: 0.672

Any chance someone could speed this up? Perhaps just replacing isSpace with a direct call to iswspace?

Want to try also the Data.ByteString.Base.isSpaceWord8 :: Word8 -> Bool We added that originally I think because isSpace was too slow. -- Don