#9923: Offer copy-on-GC sliced arrays -------------------------------------+------------------------------------- Reporter: dfeuer | Owner: simonmar Type: feature request | Status: new Priority: normal | Milestone: Component: Runtime System | Version: 7.11 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: None/Unknown | Unknown/Multiple Blocked By: | Test Case: Related Tickets: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by svenpanne): Hmmm, I doubt that this would work: The proposal means that the garbage collector must allocate memory during collections, which is quite the opposite what it is supposed to do. Put another way: If somebody (SimonM?) thinks that this is possible, I would be very interested in the details. Even if this somehow works, there are several pathological cases like having lots of 999999-element slices of a 1000000-element array. Short-circuiting projection functions is OK (IIRC nhc did that first) because one doesn't have to allocate, but slicing is not really projecting. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9923#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler