#13059: High memory usage during compilation -------------------------------------+------------------------------------- Reporter: domenkozar | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.2-rc2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: x86_64 Type of failure: Compile-time | (amd64) performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by dfeuer): There indeed seems to be a code size change (and you can ignore the minor 10GB wibble I mentioned; I think that was me measuring wrong). Everything is similar (but not identical) for a while, until float out. a0472f8 produced {{{ *** Float out(FOS {Lam = Just 0, Consts = True, OverSatApps = False}) [Data.Store.Internal]: Result size of Float out(FOS {Lam = Just 0, Consts = True, OverSatApps = False}) = {terms: 90,610, types: 838,922, coercions: 461,514} !!! Float out(FOS {Lam = Just 0, Consts = True, OverSatApps = False}) [Data.Store.Internal]: finished in 446.16 milliseconds, allocated 469.370 megabytes *** Simplifier [Data.Store.Internal]: Result size of Simplifier iteration=1 = {terms: 260,919, types: 1,555,565, coercions: 747,071} }}} But 54b887b produced {{{ *** Float out(FOS {Lam = Just 0, Consts = True, OverSatApps = False}) [Data.Store.Internal]: Result size of Float out(FOS {Lam = Just 0, Consts = True, OverSatApps = False}) = {terms: 90,693, types: 839,131, coercions: 461,514} !!! Float out(FOS {Lam = Just 0, Consts = True, OverSatApps = False}) [Data.Store.Internal]: finished in 942.78 milliseconds, allocated 470.779 megabytes *** Simplifier [Data.Store.Internal]: Result size of Simplifier iteration=1 = {terms: 502,024, types: 2,614,803, coercions: 1,192,064} }}} That's quite a jump indeed. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13059#comment:9 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler