#915: Implement list fusion using streams instead of foldr/build
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Reporter: simonpj | Owner:
Type: task | Status: new
Priority: normal | Milestone: 6.12 branch
Component: libraries/base | Version: 6.8
Severity: normal | Resolution:
Keywords: fusion | Difficulty: Project (> 1 week)
Testcase: N/A | Architecture: Multiple
Os: Unknown |
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Comment (by dons):
This library has been written and released,
http://hackage.haskell.org/cgi-bin/hackage-scripts/package/stream-fusion
To replace GHC's existing list fusion, we'll need to work out how
concatMap is optimised, and push the desugaring for list comprehensions
into GHC.
For now though, users can just use the library, and avoid list
comprehensions and [n .. m] (use enumFromTo).
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/915#comment:13>
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