[Haskell-cafe] How can I improve the pipes's performance with a huge file?

[Tom Ellis]

On Fri, Nov 14, 2014 at 05:43:15PM +0800, zhangjun.julian wrote:
> But when I test with whole file (40M rows), it take more than 20 minutes and  not finished yet.
> It take more than 9G  memorys, and the disk is also busy all time.

> import qualified Data.Map as DM

At the very least you should be using

    import qualified Data.Map.Strict as DM