Is there any chance you have Zombie checking turned on in your scheme settings? 
In my experience that might account for what you’ve described.

> On Aug 14, 2015, at 1:29 PM, Richard Kennaway <rich...@kennaway.org.uk> wrote:
> 
> I've written an iOS app that, according to Instruments, seems to very slowly 
> allocate more and more memory over time, although I can see no reason for it. 
>  After starting it, and letting it settle down, I see in the Allocations tool 
> several entries in the "#Persistent" column creeping upwards.  Typically, I 
> see an item "CFArray (mutable-variable)" incrementing its #Persistent once a 
> second, and an item "Malloc 32 Bytes" incrementing by 2 every second.  The 
> Leaks tool shows nothing.  Taking Generation snapshots at intervals of a 
> second or two shows the steady accumulation of small allocations, described 
> as <non-object>.


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