#7850: Strangely high memory usage on optimized Ackermann function ---------------------------------+------------------------------------------ Reporter: dolio | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.6.2 Keywords: | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: Runtime performance bug Difficulty: Unknown | Testcase: Blockedby: | Blocking: Related: | ---------------------------------+------------------------------------------ Comment(by adinapoli): Replying to [comment:21 applicative]:
No one seems to be pointing out that this this program ''does'' return and more importantly ''gives the correct answer'' on `ghc-7.6.2`. On this dubious macbook air (osx 10.8, 4gb , 2.4ghz, 2 cores etc), the world does not end, this wiki does not freeze, my files are not threatened; it takes as much memory as the os is willing to give it -- ~2gb -- and looks like so:
Don't know which version of the program you used but, on my Macbook, using ghc 7.6.2, 64bit, 16GB of Ram, with the program originally posted, running with -O2 hogs my computer, it takes 10GB of memory very quickly making my pc nearly unusable. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/7850#comment:23 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler