Do equality checks for dynamic arrays attempt to shortcut with pointer comparison

[dnspies]

On Thursday, 3 April 2014 at 07:16:53 UTC, simendsjo wrote:
> On 04/03/2014 09:03 AM, dnspies wrote:
>> If two dynamic arrays point to the same place in memory, is it 
>> fast to
>> compare them for equality? or does every element still have to 
>> be compared?
>
> Equals will first check for memory location.
> This is from the runtime:
>
> bool opEquals(Object lhs, Object rhs)
> {
>     // If aliased to the same object or both null => equal
>     if (lhs is rhs) return true;
>
>     // If either is null => non-equal
>     if (lhs is null || rhs is null) return false;
>
>     // If same exact type => one call to method opEquals
>     if (typeid(lhs) is typeid(rhs) || 
> typeid(lhs).opEquals(typeid(rhs)))
>         return lhs.opEquals(rhs);
>
>     // General case => symmetric calls to method opEquals
>     return lhs.opEquals(rhs) && rhs.opEquals(lhs);
> }

But this only applies to objects with a class type.  A dynamic 
array isn't an object with a class type, it's a builtin type.  
Does it use this opEquals?  Can a dynamic array even be cast to 
an Object?  I don't see that "lhs is rhs" will return true since 
the array startptr-length pairs may still occupy different places 
in memory even if the contents of those arrays occupy the same 
place.