#14944: Compile speed regression -------------------------------------+------------------------------------- Reporter: br1 | Owner: dfeuer Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.4.1 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 dfeuer): Running with a development build of either 8.2.2 or 8.4ish (I haven't checked others yet) turns up an interesting warning when compiling `Paper.hs`: the simplifier bails out after 4 iterations. So it seems at least ''possible'' that whatever goes wrong in `Main.hs` may start in `Paper.hs`, if we end up with incompletely simplified unfoldings. One problem I'm facing is that this source code is ... not very simple. It's full of rather involved constraint-based programming that's presumably documented in a paper somewhere. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14944#comment:11 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler