#12737: T12227 is failing on ghc-8.0 -------------------------------------+------------------------------------- Reporter: ezyang | Owner: Type: bug | Status: new Priority: normal | Milestone: 8.0.2 Component: Visual Haskell | Version: 8.0.1 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 bgamari): According to ticky, it looks like the primary differences between `master` (namely 2cb8cc26df6af431d30b6964710ea2d859ca2bcd) and `ghc-8.0` (namely a32221830e478bb7c282ff325d9f62cc16af40da, which is admittedly quite far removed chronologically from the cherry-picked commit) are indeed in `Pretty`, {{{ | Change | alloc A | alloc B | name | |---------------|-----------|------------|------------------------------------------------------------------| | +3474432240.0 | 262333536 | 3736765776 | beside (ghc:Pretty) | | +951367008.0 | 221431440 | 1172798448 | $waboveNest (ghc:Pretty) | | +140163848.0 | 91135776 | 231299624 | (ghc:Coercion.coercionKind_go) | | +118356184.0 | 63778576 | 182134760 | $wsplitAtList (ghc:Util.) | | +111367360.0 | 640 | 111368000 | $w$cput_6 (ghc:Binary.) | | +94517880.0 | 18616520 | 113134400 | $wunpack (ghc:Encoding) | | +85860960.0 | 13610200 | 99471160 | $windent (ghc:Pretty) | | +45853128.0 | 13206856 | 59059984 | $s$wget1 (ghc:Pretty) | | +31953400.0 | 8224616 | 40178016 | $wsep1 (ghc:Pretty.) | | +29843944.0 | 8127648 | 37971592 | $wpprName (ghc:Name.) | | +29057288.0 | 20964736 | 50022024 | $wsubstTyWith (ghc:TyCoRep.) | | +22840864.0 | 11732016 | 34572880 | $wtyCoFVsOfType (ghc:TyCoRep.) | | +22640112.0 | 17493648 | 40133760 | (ghc:TyCon.expandSynTyCon_maybe) | | +22354288.0 | 5551864 | 27906152 | $wlay2 (ghc:Pretty) | | +19673016.0 | 14129160 | 33802176 | (ghc:Unify.liftCoMatch) | | +16728760.0 | 9231400 | 25960160 | (ghc:Unify.ty_co_match) | | +15683720.0 | 9053800 | 24737520 | $wcoercionKindRole (ghc:Coercion.) | | +15627024.0 | 3566736 | 19193760 | (ghc:IfaceType.toIfaceTcArgs_go) | | +15499856.0 | 3545152 | 19045008 | $wget (ghc:Pretty) | | +15113200.0 | 5327048 | 20440248 | (ghc:IfaceType.toIfaceType) | | +14813696.0 | 3417088 | 18230784 | $wppr_iface_tc_app (ghc:IfaceType) | | +14507168.0 | 2747264 | 17254432 | (ghc:Name.pprModulePrefix) | | +13158528.0 | 2774064 | 15932592 | $wxs1 (ghc:Pretty) | | +12767416.0 | 5934000 | 18701416 | (ghc:OptCoercion.opt_co4) | | +11420416.0 | 2612848 | 14033264 | $wlay1 (ghc:Pretty) | | +11400448.0 | 7529920 | 18930368 | $ssubst_ty (ghc:TyCoRep.composeTCvSubst_) | | +10744600.0 | 79480 | 10824080 | $w$cput_7 (ghc:IfaceType.) | | +10555272.0 | 3780088 | 14335360 | (ghc:IfaceType.toIfaceTcArgs) | | +10380952.0 | 6663952 | 17044904 | isAxiom_maybe (ghc:OptCoercion) | ... }}} Working on why this is the case will require some more effort. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12737#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler