#12357: Increasing maximum constraint tuple size significantly blows up compiler allocations -------------------------------------+------------------------------------- Reporter: bgamari | Owner: Type: bug | 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 bgamari): Another related efficiency issue can be found in `isDerivedOccName`, which decodes the entire `OccName` just to check the first two characters. One potential improvement here would be to use a bit in `OccName` (e.g. one of the many unused bits belonging to the `Namespace` field) to encode a "is derived" flag. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12357#comment:13 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler