#9669: Long compile time/high memory usage for modules with many deriving clauses -------------------------------------+------------------------------------- Reporter: snoyberg | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.3 Resolution: | Keywords: Operating System: Linux | Architecture: x86_64 (amd64) Type of failure: Compile- | Difficulty: Unknown time performance bug | Blocked By: Test Case: | Related Tickets: Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by rehno-lindeque): I have a largish repo of (private) persistent entities I could reformat in order to make public if it would be helpful for anyone working on this. On my macbook air running ubuntu it takes several minutes to build from scratch: {{{ cabal clean && cabal configure && time cabal build real 9m3.969s user 16m2.376s sys 4m9.406s }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9669#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler