Confirmed.
<https://github.com/JuliaLang/julia/issues/11750#issuecomment-113253753>
On Thursday, June 18, 2015 at 11:14:50 AM UTC-5, Josh Langsfeld wrote:
>
> It's actually pretty weird. It will take the shortcut if you pass it an
> AbstractArray{Bool}, but only if it has 16 or more elements. For other
> array types, it still never takes it.
>
> On Thursday, June 18, 2015 at 12:07:48 PM UTC-4, Seth wrote:
>>
>> Thanks, Josh. I opened #11750
>> <https://github.com/JuliaLang/julia/issues/11750>.
>>
>> On Thursday, June 18, 2015 at 11:04:29 AM UTC-5, Josh Langsfeld wrote:
>>>
>>> It seems 'any' calls 'mapreduce' which calls 'mapfoldl' which has a
>>> specialization that will stop computing in the case of searching for a
>>> single true or false value. However, it seems the call to mapreduce instead
>>> goes to a more specific method that doesn't implement this shortcut. If
>>> 'any' were to call mapfoldl directly, it would do the lazy computing.
>>>
>>> On Thursday, June 18, 2015 at 11:18:12 AM UTC-4, Seth wrote:
>>>>
>>>>
>>>>
>>>> julia> function bar(x)
>>>> info("bar $x")
>>>> x
>>>> end
>>>> bar (generic function with 1 method)
>>>>
>>>> julia> any(v->bar(v), [false, false, true, false, false])
>>>> INFO: bar false
>>>> INFO: bar false
>>>> INFO: bar true
>>>> INFO: bar false
>>>> INFO: bar false
>>>> true
>>>>
>>>> Is there a reason the rest of the elements in the collection are
>>>> evaluated after the first true is encountered?
>>>>
>>>
