#4507: Data.List.sum and Data.List.product unnecessarily inefficient
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Reporter: pozorvlak | Owner:
Type: bug | Status: closed
Priority: normal | Milestone:
Component: libraries/base | Version: 7.0.1
Resolution: wontfix | Keywords: Data.List, sum, product, foldl'
Testcase: | Blockedby:
Difficulty: | Os: Unknown/Multiple
Blocking: | Architecture: Unknown/Multiple
Failure: None/Unknown |
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Comment(by igloo):
Replying to [comment:2 pozorvlak]:
> I am confused. The Haskell 2010 Language Report section on Data.List
(http://www.haskell.org/onlinereport/haskell2010/haskellch20.html#x28-23100020.3)
doesn't say anything about the strictness of sum or product that I can
see: the Haskell 1998 Report doesn't mention Data.List at all. Where
should I be looking? Note that I'm talking about the sum and product
defined in Data.List, not the ones in the Prelude.
I'm sure they're intended to be the same.
It's unfortunate that H2010 no longer has reference implementations for
the functions it defines.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4507#comment:3>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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