20 Jul
2011
20 Jul
'11
5:08 p.m.
I would have thought that the compiler, as a matter of optimisation, could insert a check to see if (==) is comparing an object with itself. The only way I can see this breaking is with perverse instances of Eq that would return False for "f == f". Paul. On 07/20/2011 04:51 AM, Nikhil A. Patil wrote:
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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