#11735: Optimize coercionKind -------------------------------------+------------------------------------- Reporter: goldfire | Owner: (none) Type: task | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.3 Resolution: | Keywords: 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 goldfire): I'm not still working on this. I pushed the changes I had in mind to the tdammers branch. If the performance is OK there, could you please Phab and then commit? As for `simplCast`, the changes I had in mind are all on your branch, including removing the inefficient one-variable substitution. If my changes aren't an improvement, try undoing the change I made to the ordering of cases in `simplCast`: I moved the `isReflexiveCo` case to the top, but perhaps that check is too expensive and is better at the bottom. Regardless, the changes I made in CoreOpt should be enough to improve performance. Thanks! -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11735#comment:71 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler