#7258: Compiling DynFlags is jolly slow -------------------------------------+------------------------------------- Reporter: simonpj | Owner: simonpj Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.6.1 Resolution: | Keywords: deriving-perf 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): On further thought, #14364 is a bit of a stop-gap measure; generating more efficient `Read` instances is of course a good thing, but the register allocator edge case remains, and hand-written code (or TH-generated code) that follows a similar pattern will still hit it. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/7258#comment:41 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler