#2731: Avoid unnecessary evaluation when unpacking constructors -------------------------------------+------------------------------------- Reporter: simonpj | Owner: (none) Type: bug | Status: new Priority: lowest | Milestone: Component: Compiler | Version: 8.5 Resolution: | Keywords: CodeGen 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 simonpj):

To solve this we would need to track the evaluation requirements of binders in STG.

Correct -- and it really would not be hard to do. A relatively straightforward task for someone interested in GHC's back end. I'd be happy to advise. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/2731#comment:18 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler