#13253: Exponential compilation time with RWST & ReaderT stack with `-02` -------------------------------------+------------------------------------- Reporter: phadej | Owner: dfeuer Type: bug | Status: new Priority: normal | Milestone: 8.4.1 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 mpickering): Reverting 1722fa106e10e63160bb2322e2ccb830fd5b9ab3 improves the situation somewhat but -DBIG is still quite a bit slower. Pre-revert 12s without -DBIG 1m12 with -DBIG Post-revert 8s without -DBIG 28s with -DBIG -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13253#comment:12 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler