#4941: SpecConstr generates functions that do not use their arguments
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Reporter: simonpj | Owner:
Type: task | Status: new
Priority: normal | Milestone: _|_
Component: Compiler | Version: 7.0.1
Keywords: | Testcase:
Blockedby: | Difficulty:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: Runtime performance bug
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Comment(by batterseapower):
I've confirmed that the problem I identified was the source of increased
allocations in crypytarithm2. I opened #4962 to track progress on that
issue.
With my hacky patch for that problem, the new numbers are:
{{{
Min +0.0% -4.7% -4.8% -4.9% +0.0%
Max +0.3% +2.4% +4.6% +4.7% +0.0%
Geometric Mean +0.0% -0.2% +0.3% +0.1% -0.0%
}}}
Allocations are only being increased in lift (+0.1%) and para (+2.4%). I'm
investigating now.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4941#comment:15>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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