#9075: Per-thread weak pointer list (remove global lock on mkWeak#) ------------------------------+-------------------------------------------- Reporter: ezyang | Owner: simonmar Type: bug | Status: new Priority: low | Milestone: Component: Runtime | Version: 7.9 System | Operating System: Unknown/Multiple Keywords: easy | Type of failure: Runtime performance bug Architecture: | Test Case: Unknown/Multiple | Blocking: Difficulty: Unknown | Blocked By: | Related Tickets: | ------------------------------+-------------------------------------------- Currently, we have to take out the storage manager lock when a weak pointer is allocated. If you're making a lot of weak pointers, this could become a bottleneck. We should maintain a per-thread weak pointer list per generation, so that we don't have to take out a lock. Marking priority as low since I don't think anyone actually is trying to allocate tons of weak pointers on multiple threads, but I think this optimization should be relatively cheap. Probably a good starter ticket. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9075 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler