#15642: Improve the worst case performance of weak pointers -------------------------------------+------------------------------------- Reporter: dfeuer | Owner: (none) Type: feature request | Status: new Priority: normal | Milestone: 8.8.1 Component: Runtime System | Version: 8.6.1-beta1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonmar): Taking a bit in the info pointer for this seems like a very high cost. We only have one spare bit (on 32-bit), and furthermore using that bit has a runtime cost because we'd have to mask it everywhere. Doesn't seem worth it to me. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15642#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler