#12367: Commit adding instances to GHC.Generics regression compiler performance -------------------------------------+------------------------------------- Reporter: bgamari | Owner: bgamari Type: bug | Status: new Priority: normal | Milestone: 8.0.2 Component: Compiler | Version: 8.0.1 Resolution: | Keywords: Generics Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by bgamari): I've made a bit of progress tracking down the cause of GHC.Generics being loaded when looking for a `Foldable []` instance. It looks like the cause is the evaluation of the `mod` binding in IfaceEnv.instIsVisible. The RHS of this binding pulls on is_dfun to get its `idName` (which it only need the Module from). -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12367#comment:14 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler