Re: [Haskell-cafe] bizarre memory usage with data.binary

On Tue, Oct 02, 2007 at 04:08:01PM -0700, Anatoly Yakovenko wrote:

i am getting some weird memory usage out of this program:

module Main where

import Data.Binary import Data.List(foldl')

main = do let sum' = foldl' (+) 0 let list::[Int] = decode $ encode $ ([1..] :: [Int]) print $ sum' list print "done"

it goes up to 500M and down to 17M on windows. Its build with ghc 6.6.1 with the latest data.binary

Any ideas what could be causing the memory usage to jump around so much?

Only 500M? encode for lists is strict, I would have expected around 80GB usage... What does -ddump-simpl-stats say? Stefan