#13566: Bigger core size in ghc8 compared to ghc7 -------------------------------------+------------------------------------- Reporter: pacak | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.1-rc2 Resolution: | Keywords: 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: | -------------------------------------+------------------------------------- Comment (by pacak): GHC 8.2 on original code: {{{ Result size of Demand analysis = {terms: 5,548, types: 10,236, coercions: 2,752, joins: 10/79} !!! Demand analysis [A]: finished in 198.43 milliseconds, allocated 43.533 megabytes *** CoreTidy [A]: Result size of Tidy Core = {terms: 1,150, types: 2,274, coercions: 320, joins: 0/14} !!! CoreTidy [A]: finished in 6.72 milliseconds, allocated 6.210 megabytes writeBinIface: 149 Names writeBinIface: 279 dict entries writeBinIface: 149 Names writeBinIface: 279 dict entries *** CorePrep [A]: Result size of CorePrep = {terms: 1,342, types: 2,838, coercions: 320, joins: 0/66} }}} Looks like ghc 8.2 also produces similar sized core and manages to clean it up later. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13566#comment:7 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler