#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): Found one possible reason for the allocation increase: boyer2 was losing a no-let-escape, because the insight from `Note [CPR for sum types]` was not applied inside a nested CPR result. Fixed that now, nofibs are running. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/1600#comment:29 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler