Re: [Haskell-cafe] Data.ByteStream.Char8.words performance

On Fri, 30 Mar 2007, Jeremy Shaw wrote:

Hello,

Did you compile with -O2 ? That makes a huge difference when using ByteString.

j.

Ah, that was exactly it. I feel silly.

module Main where

import qualified Data.ByteString.Char8 as B

main = do content <- B.readFile "test-text-file" let l = length . B.words $ content print l

$ ghc -O2 count-b.hs $ time ./a.out 174372 real 0m0.198s user 0m0.136s sys 0m0.012s Much faster. Thank you! dino-