#14929: Program compiled with -O2 exhibits much worse performance -------------------------------------+------------------------------------- Reporter: mpickering | Owner: (none) Type: bug | Status: new Priority: high | Milestone: Component: Compiler | Version: 8.2.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by George): According to https://www.reddit.com/r/haskell/comments/84qovv/an_example_of_code_where_gh... it's now down to 60 lines but I don't see any way to get those 60 lines: https://www.reddit.com/r/haskell/comments/84qovv/an_example_of_code_where_gh... Also according to that page, compiling with -fno-full-laziness is a workaround -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14929#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler