>>>>> Alexey Raga <alexey.r...@gmail.com> writes: > while this one runs much slower (>2 minutes to execute): > bslines :: (MonadIO m) => Producer ByteString m () > bslines = purely folds mconcat . view BS.lines $ BS.stdin
> main :: IO () > main = runEffect $ bslines >-> BS.stdout > Why does it happen? I'm pretty sure this is accumulating the entire file into memory, calling mconcat N types, which will pay the cost of appending N times on segments of ever growing length. I think that using 'concats' will achieve what you want without degrading performance, if I had to guess John -- You received this message because you are subscribed to the Google Groups "Haskell Pipes" group. To unsubscribe from this group and stop receiving emails from it, send an email to haskell-pipes+unsubscr...@googlegroups.com. To post to this group, send email to haskell-pipes@googlegroups.com.
