#12790: GHC 8.0.1 uses copious amounts of RAM and time when trying to compile lambdabot-haskell-plugins -------------------------------------+------------------------------------- Reporter: clint | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by RyanGlScott): Simon, I've opened #12936 to figure out that `parsec` issue. Until then, you can work around it by checking out a local copy of `parsec-3.1.11` with `cabal get parsec-3.1.11`, edit `parsec-3.1.11/Text/Parsec/Token.hs`, and change the definition to `makeTokenParser = undefined`. I don't believe its definition is used in this example anyways. Moreover, after making that change, I can confirm that the example in https://ghc.haskell.org/trac/ghc/ticket/12790#comment:7 also exhibits the same slowdown in GHC HEAD (compiling it with `-O -prof`, of course). -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12790#comment:9 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler