Re: [Haskell-cafe] double2Float is faster than (fromRational . toRational)

I see. And I changed the code, it works well. Thanks for that! Daniel Henning Thielemann schrieb:

On Fri, 21 May 2010, Daniel van den Eijkel wrote:

...

Dear Haskellers,

I just want to share an observation. I had to convert a Double to a Float value in an inner loop of an application, and I used somethin like this:

xf = (fromRational $ toRational xd) :: Float

I think realToFrac is the function to use here, and this might be replaced by double2Float by an optimizer rule. I think double2Float is from a GHC package and thus one should avoid to call double2Float directly.