#10830: maximumBy has a space leak -------------------------------------+------------------------------------- Reporter: NeilMitchell | Owner: Type: bug | Status: new Priority: normal | Milestone: 7.10.3 Component: libraries/base | Version: 7.10.2 Resolution: | Keywords: Operating System: Windows | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: Phab:D1205 -------------------------------------+------------------------------------- Comment (by NeilMitchell): It's pretty rare that you are using `maximumBy` with a custom function and the result type is {{{Int}}} or {{{Integer}}} - typically you'd just use {{{minimum}}} or {{{maximum}}} directly - so I don't think special cases are likely to be of any benefit. I think using {{{foldl1}}} is the only way to reduce the space leak, which is what happened in base-4.7 for Data.List. The Foldable variants have always been foldr1, but maybe that's a bug in Foldable? It's certainly a BBP regression. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10830#comment:14 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler