#7602: Threaded RTS performing badly on recent OS X (10.8?) -----------------------------------+---------------------------------- Reporter: simonmar | Owner: thoughtpolice Type: bug | Status: new Priority: highest | Milestone: 7.8.1 Component: Runtime System | Version: 7.7 Resolution: | Keywords: Operating System: MacOS X | Architecture: x86_64 (amd64) Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: 7678 Blocking: | Related Tickets: -----------------------------------+---------------------------------- Comment (by ezyang): I must admit, I'm surprised that passing the thread-local state as a variable is not good performance-wise. At least within a function like evacuate, where everything ends up getting inlined into one giant function body, register pressure on x86_64 is low enough that I have seen (experimentally) that GCC is able to arrange for an extra parameter to not get spilled. Perhaps the situation is not so good across function call boundaries, but I don't see why it should necessarily be a problem. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/7602#comment:29 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler