#13002: :set -O does not work in .ghci file -------------------------------------+------------------------------------- Reporter: George | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.0.3 Component: GHCi | Version: 8.0.1 Resolution: | Keywords: | RecompilationCheck 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: | -------------------------------------+------------------------------------- Changes (by George): * status: closed => new * resolution: worksforme => Comment: Thanks for taking the time to investigate, I should have been more explicit, the bug is not about the small timing difference; it is about the large allocation difference: 8,885,888 bytes vs 98,400 bytes. That is not insignficant right? think it is the difference between fusion occurring and not occurring. I agree that the ddump-simpl output seems to show that it is not a bug but the allocation difference indicates to me that it is not optimizing i.e.doing list fusion. I thought it worth double checking. If you are still not convinced feel free to close and I will try to come up with a more robust test case or convince myself that I am wrong. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13002#comment:11 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler