[Haskell-cafe] Re: Haskell performance (again)!

Bulat Ziganshin bulat.ziganshin at gmail.com
Tue Oct 10 10:51:26 EDT 2006

Hello Jon,

Tuesday, October 10, 2006, 1:18:52 PM, you wrote:

> Surely all but one of the comparisons is unnecessary? If you
> use `compare` instead of (==) and friends, won't one do (I'm
> assuming that the compiler can convert cases on LT, EQ and
> GT into something sensible -- after all, wasn't that the
> purpose of compare?)?

it will too smart for GHC. actual code is:

compareInt# :: Int# -> Int# -> Ordering
compareInt# x# y#
    | x# <#  y# = LT
    | x# ==# y# = EQ
    | otherwise = GT

Best regards,
 Bulat                            mailto:Bulat.Ziganshin at gmail.com

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