#2271: floor, ceiling, round :: Double -> Int are awesomely slow
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Reporter: dons | Owner: daniel.is.fischer
Type: bug | Status: patch
Priority: low | Milestone: 7.0.1
Component: libraries/base | Version: 7.1
Keywords: performance, math, double | Testcase:
Blockedby: | Difficulty: Unknown
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: None/Unknown
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Comment(by daniel.is.fischer):
(b) is not a very good option here. I tried it, but if you include GHC.Int
and GHC.Word in GHC.Float, you get an import cycle
{{{
GHC.Int/Word < GHC.Read < GHC.Float < GHC.Int/Word
}}}
Could be broken with .hs-boot, of course, but I'm not too keen on that.
So GHC.Int/Word, where the types are defined, seems the best place,
although adding GHC.Float to their imports seems a bit strange.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2271#comment:24>
GHC <http://www.haskell.org/ghc/>
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