#8027: Adding one call to getNumCapabilities triggers performance nose dive (6X slowdown) ---------------------------------+------------------------------------------ Reporter: rrnewton | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Runtime System | Version: 7.6.3 Keywords: | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: Runtime performance bug Difficulty: Unknown | Testcase: Blockedby: | Blocking: Related: | ---------------------------------+------------------------------------------ Comment(by rrnewton): UPDATE: I found at least one other way to trigger the bug without calling those system functions. This makes me think its some kind of compiler bug (or mis-optimization) rather than a runtime bug. I would love to know if anyone else can reproduce this problem... -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/8027#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler