#9557: Deriving instances is slow -------------------------------------+------------------------------------- Reporter: Feuerbach | Owner: Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 7.8.3 Resolution: duplicate | Keywords: Operating System: | Architecture: Unknown/Multiple Unknown/Multiple | Difficulty: Unknown Type of failure: | Blocked By: None/Unknown | Related Tickets: #8731 Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by Feuerbach): carter: why do you think they are the same? There, the reason is the large number of field selectors. Here, I was able to check that removing some of the class derivations reduces the compile time significantly. I'm not convinced that fixing that issue will necessarily fix this one; they may (or may not) be inefficiencies in different parts of code. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9557#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler