#5954: Performance regression 7.0 -> 7.2 (still in 7.4)
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Reporter: simonmar | Owner: simonpj
Type: bug | Status: new
Priority: high | Milestone: 7.4.2
Component: Compiler | Version: 7.4.1
Keywords: | Os: Unknown/Multiple
Architecture: Unknown/Multiple | Failure: Runtime performance bug
Difficulty: Unknown | Testcase:
Blockedby: | Blocking:
Related: |
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Comment(by michalt):
Replying to [comment:4 simonmar]:
> There is an opportunity for CSE which 7.0 spots but later versions
don't. It is probably a bug in `blackscholes.hs` itself:
>
> {{{
> nofXd1 = cndf xD1
> nofXd2 = cndf xD1
> }}}
>
> Regardless, we don't know why CSE is not catching this any more, and we
plan to look into it.
I don't have much time right now to look into details, but can this be
related to #5996?
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5954#comment:5>
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