#9067: Optimize clearNursery by short-circuiting when we get to currentNursery --------------------------------------------+------------------------------ Reporter: ezyang | Owner: ezyang Type: task | Status: new Priority: low | Milestone: Component: Runtime System | Version: 7.9 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime performance bug | Unknown/Multiple Test Case: | Difficulty: Unknown Blocking: | Blocked By: | Related Tickets: --------------------------------------------+------------------------------ Comment (by simonmar): Andreas Voellmy and I talked about some similar ideas. I doubt that you want to rely on `CurrentNursery`, because we want to reset that after every GC, but instead I think the right approach is to assume that every block from `CurrentNursery` onwards needs to have its free pointer reset before we use it. It's a somewhat subtle invariant and something else we have to get right, but the win seems to be worthwhile. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9067#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler