#11707: Don't desugar large lists with build -------------------------------------+------------------------------------- Reporter: bgamari | Owner: Type: bug | Status: patch Priority: normal | Milestone: Component: Compiler | Version: 7.10.3 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): Phab:D2007 Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): See #11710; I think we should abandon the "static tail" idea described in `Note [Desugaring explicit lists]` entirely. Then, to avoid code bloat on very long lists, let's have the patch in this ticket, which ensures that if the list is long we revert to cons-list for. The goal here is just to eliminate mega-code-bloat in extreme cases. (Hence no real need for a flag to control `maxBuildLength`. I don't really like it; but I don't want BOTH hacks. One is enough! Not worth burning much midnight oil on this one. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11707#comment:9 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler