[GHC] #9332: Memory blowing up for strict sum/strict foldl in ghci
GHC
ghc-devs at haskell.org
Sat Jul 19 10:58:16 UTC 2014
#9332: Memory blowing up for strict sum/strict foldl in ghci
-------------------------------------+-------------------------------------
Reporter: artella.coding | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: GHCi | Version: 7.8.3
Keywords: ghci, strict, | Differential Revisions:
memory | Architecture: x86_64
Operating System: Linux | (amd64)
Type of failure: Runtime | Difficulty: Unknown
performance bug | Blocked By:
Test Case: | Related Tickets:
Blocking: |
-------------------------------------+-------------------------------------
(http://stackoverflow.com/questions/24838982/memory-blowing-up-for-strict-
sum-strict-foldl-in-ghci)
Suppose we have
{{{
--Test.hs
import Data.List
longList::[Int]
longList = [1 .. ]
result :: Int
result = foldl' (+) 0 $ takeWhile (< 10000000) longList
main = do
print $ result
}}}
If one deletes all the ".hi" and ".o" files and then loads into ghci via :
{{{
ghci -fobject-code Test.hs
}}}
then upon running "main" the memory blows up.
However if one first compiles via :
{{{
ghc Test.hs
}}}
and then subsequently loads into ghci via :
{{{
ghci Test.hs
}}}
then upon running "main" the memory does not blow up.
--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9332>
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