More radical ideas about gc and reference counting

[Dicebot via Digitalmars-d]

On Saturday, 10 May 2014 at 13:33:40 UTC, Manu via Digitalmars-d 
wrote:
> On 10 May 2014 17:08, Andrei Alexandrescu via Digitalmars-d
> <digitalmars-d at puremagic.com> wrote:
>> On 5/9/14, 11:27 PM, Manu via Digitalmars-d wrote:
>>>
>>> ARC overhead would have no meaningful impact on performance, 
>>> GC may
>>> potentially freeze execution. I am certain I would never 
>>> notice ARC
>>> overhead on a profiler, and if I did, there are very simple 
>>> methods to
>>> shift it elsewhere in the few specific circumstances it 
>>> emerges.
>>
>>
>> This is very, very, very wrong. -- Andrei
>
> Is there any evidence to support that assertion?
> I have many colleagues who work on phones. The patterns I see 
> are that
> the iOS guys who use Obj-C never complain about it, and the GC 
> guys
> are often struggling with it.
> The bias in gamedev is strongly towards iOS too, so that should 
> be a
> more populous group to draw samples from.

You conflate freezing and performance. ARC easily can be slower 
but is has benefit of slowdown distributed more evenly thus not 
obviously notable.