#4005: paraffins: slowdown of ca 2 with -O2
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Reporter: hwloidl | Owner: igloo
Type: bug | Status: new
Priority: high | Milestone: 6.12.3
Component: Compiler | Version: 6.12.1 RC1
Keywords: optimisation | Difficulty:
Os: Linux | Testcase: see attached (compile and run) log
Architecture: x86 | Failure: Runtime performance bug
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Comment(by simonmar):
The heap is full of `[Radical]`. It looks like the optimiser has somehow
increased sharing, but I couldn't pinpoint the problem easily because the
Core is long and very deeply nested.
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4005#comment:5>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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