#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 akio): It seems like the above results were bogus because it used libraries compiled with the wrong compiler (I had `stage=2` in build.mk. I removed it and typed `make`. Is it not sufficient to cause a full build?). After a clean build, the allocation numbers look very good: {{{ -------------------------------------------------------------------------------- Program Size Allocs Runtime Elapsed TotalMem -------------------------------------------------------------------------------- compress2 +2.0% -0.9% 0.170 0.170 -3.7% fft2 +1.0% -0.2% 0.078 0.078 0.0% fluid +2.1% -0.4% 0.006 0.006 0.0% gamteb +0.4% -4.5% 0.032 0.032 0.0% gcd +0.7% -21.4% 0.046 0.046 0.0% infer -0.1% -1.2% 0.054 0.054 0.0% integer +1.0% -1.5% -15.0% -15.0% 0.0% mandel +1.0% -24.4% 0.051 0.051 0.0% rfib +1.0% -0.3% 0.012 0.012 0.0% solid +0.4% -6.6% 0.130 0.131 0.0% -------------------------------------------------------------------------------- Min -0.2% -24.4% -21.1% -21.3% -3.7% Max +2.1% +0.1% +39.3% +39.3% +17.3% Geometric Mean +0.2% -0.7% -4.9% -4.9% +0.1% }}} Should I worry about the increase in the code size? If not I'll clean up the branch and submit a Diff. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/1600#comment:60 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler