#12150: Compile time performance degradation on code that uses undefined/error with CallStacks -------------------------------------+------------------------------------- Reporter: thomie | Owner: Type: bug | Status: new Priority: high | Milestone: 8.0.2 Component: Compiler | Version: 8.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: #10844 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by gridaphobe): Thomie, could you share the program from which you derived your example? Does it also use `undefined` or was it using CallStacks in some other manner? And if it was using `undefined`, do you see a similar slowdown if you replace `undefined` with the old (callstack-less) `error`? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12150#comment:8 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler