#1600: Optimisation: CPR the results of IO -------------------------------------+------------------------------------- Reporter: simonmar | Owner: nomeata Type: task | Status: new Priority: lowest | Milestone: 7.6.2 Component: Compiler | Version: 6.6.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: Runtime | Difficulty: Moderate (less performance bug | than a day) Test Case: | Blocked By: Blocking: | Related Tickets: #8598 -------------------------------------+------------------------------------- Comment (by nomeata): Small status update: My work on nested CPR has now reached somewhat conclusive state. The performance changes are not great, but it is still nice to have, especially if users who would re-write their code for performance would no longer have to do so. It should not go in for 7.8 – the gains are too small, and there still might be corner cases bugs. So I plan to merge it somewhen after 7.8. Until then, the branch `wip/nested-cpr` contains the changes in mostly cleaned-up, individually validated patches. I might occasionally rebase that branch to keep the conflicts small. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/1600#comment:40 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler