#10293: CallArity taking 20% of compile time -------------------------------------+------------------------------------- Reporter: simonpj | Owner: nomeata Type: bug | Status: new Priority: high | Milestone: 7.12.1 Component: Compiler | Version: 7.10.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: None/Unknown | Unknown/Multiple Blocked By: | Test Case: Related Tickets: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by nomeata): The culprit is `callArityRecEnv` , which analyzes recursive groups and calls `calledWith` with quadratic complexity. I might have an idea for way to shortcut this. Or maybe the code should revert to a quick and conservative conversation when analyzing a very large recursive group – the largest here is has 754 mutually recursive definitions. I’ll need to ponder this some more. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10293#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler