#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 tdammers): The caching approach implemented directly (i.e., adding a `Role` field to the `NthCo` constructor) is a fairly pervasive one; it turns out that many modules depend on that constructor, either directly o via the isomorphic `IfaceCoercion` type (which, I believe, should inherit the additional field, correct me if I'm wrong), so adding the extra fields is going to touch a lot of source files. Not a fundamental problem per se, but it means that this will take a little while and will deserve some extra scrutinity before unleashing it. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11735#comment:26 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler