13:05 - This is a *huge* simplification to the point of being a lie. Array's single stored property is another struct, which itself has another struct as its single stored property. Eventually, on Apple platforms, that bottoms out as a Builtin.BridgeObject, which is essentially an optimized sum of either an ObjC or a Swift object reference. So it is a pointer that's referenced-counted at the end of the day, but there's a lot of extra stuff to it that I had to leave out.