#7309: The Ix instance for (,) leaks space in range
----------------------------------+-----------------------------------------
Reporter: nomeata | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: libraries (other) | Version: 7.6.1
Keywords: | Os: Unknown/Multiple
Architecture: Unknown/Multiple | Failure: Runtime performance bug
Difficulty: Unknown | Testcase:
Blockedby: | Blocking:
Related: |
----------------------------------+-----------------------------------------
Comment(by nomeata):
Would #7206 really help here? After all, the problematic code is
polymophic, so there is not a concrete ```range``` that could be inlined
to a ```cheapBuild```.
In code where the tuple-```range``` is inlined and the concrete
```range``` functions of the element types are known (as in the second
example in the stack exchange question), things already work out nicely as
the foldr/builder fusion actually kicks in.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7309#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
_______________________________________________
Glasgow-haskell-bugs mailing list
Glasgow-haskell-bugs@haskell.org
http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
