#1600: Optimisation: CPR the results of IO -------------------------------------+------------------------------------- Reporter: simonmar | Owner: (none) Type: task | Status: new Priority: lowest | Milestone: Component: Compiler | Version: 6.6.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: #8598 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonmar):
(I had stage=2 in build.mk. I removed it and typed make. Is it not sufficient to cause a full build?).
make won't necessarily rebuild your libraries, due to GHC's recompilation avoidance. It knows about changes in the source code and the flags, but it doesn't know about changes in GHC itself. So when I'm making measurements like this, I always delete the library object files manually: ``` find libraries/*/dist-install | grep 'o$' | xargs rm ``` -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/1600#comment:61 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler