#14738: Investigate performance of CoreTidy -------------------------------------+------------------------------------- Reporter: tdammers | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: #11735 #14683 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by tdammers): The problem seems to mysteriously go away on newer commits. Adding more cost centres to GHC HEAD, I've found that `CoreTidy` hardly shows up in the profile at all, and practically all the remaining slowdown comes from code in `Simplify.hs`, which I believe #14737 is about. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14738#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler