#8635: GHC optimisation flag ignored when importing a local module with derived type classes -------------------------------------+------------------------------------ Reporter: NeilMitchell | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.6.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------ Comment (by NeilMitchell): Thanks for the explanation. As long as it doesn't happen at `-O1` (which it won't, from your explanation) it won't actually matter to me in practice. It does mean that at `-O0` the effect of things like `-O2` is dependent on what modules you import, what functions they use, what order things are processed by `ghc --make` etc. I suspect that inlining very small things like `$` can only be a win in terms of code size. Seeing them in the output, even at `-O0`, was a little surprising (although entirely understandable). -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8635#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler