#12847: ghci -fobject-code -O2 doesn't do the same optimisations as ghc --make -O2 -------------------------------------+------------------------------------- Reporter: nh2 | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: Operating System: Other | Architecture: Type of failure: Compile-time | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by rwbarton): Although you don't say so explicitly, you seem to be invoking `ghci` and then running `:set -fforce-recomp -fobject-code -O2 -v` at the prompt. Does the same happen with `ghci -fforce-recomp -fobject-code -O2 -v`? This could be because of #9370, where decisions about whether to inline a function are effectively made when reading the interface file in which the function is defined; and at that point you may not have `-O2` set yet. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12847#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler