[Haskell-cafe] pointer equality

[yi huang]

2011/7/20 Eugene Kirpichov <ekirpichov at gmail.com>

> reallyUnsafePointerEq#, and it really is as unsafe as it sounds :)
>
> Why is it so unsafe? i can't find any documentation on it.
I think always compare pointer first is a good optimization.


>
>
> 20.07.2011, в 7:51, "Nikhil A. Patil" <patil.nikhil at gmail.com> написал(а):
>
> > Hi,
> >
> > Is there any way of getting the following code to immediately return
> > True without performing the element-by-element comparison? Essentially
> > this boils down to checking whether pointers are equal before
> > comparing the contents.
> >
> >> main = print $ f == f
> >>      where f = [1..10^9]
> >
> > Thanks!!
> >
> > nikhil
> >
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