#9675: Unreasonable memory usage on large data structures -------------------------------------+------------------------------------- Reporter: Polarina | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.3 Resolution: | Keywords: Operating System: Linux | Architecture: x86_64 (amd64) Type of failure: Compile- | Difficulty: Unknown time performance bug | Blocked By: Test Case: | Related Tickets: Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by nomeata): Heap profiling tells me that most of it is retained by `dmdAnalRhs`, produced by `annotateBndrs/dmdAnalAlt/dmdAnal'`. But even after cluttering most of the module with {{{`seq`}}} and bang patterns, the leak is still there.... and just while I was about to give up I found the problem: The environment part of a DmdType is not seq’ed. Doing that does great good. Patch coming.... :-) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9675#comment:11 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler