#8095: TypeFamilies painfully slow -------------------------------------+------------------------------------- Reporter: MikeIzbicki | Owner: bgamari Type: bug | Status: new Priority: high | Milestone: 8.0.1 Component: Compiler (Type | Version: 7.6.3 checker) | Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: 5321 | Differential Rev(s): -------------------------------------+------------------------------------- Comment (by simonpj):
Maybe the solution is to be more eager with the coercion optimizer?
I don't think so. If the type checker generates a term of quadratic size, it'll take at least quadratic time to generate, and quadratic time to optimise. We should look into why it gets so big in the first place. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8095#comment:12 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler