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Re: Compiler warnings with the new base code

From: Richard Frith-Macdonald
Subject: Re: Compiler warnings with the new base code
Date: Thu, 18 Feb 2010 10:42:56 +0000

On 18 Feb 2010, at 10:33, David Chisnall wrote:

> On 18 Feb 2010, at 09:09, Fred Kiefer wrote:
>> base/NSNumber/basic.m:
>> FAIL: Object 0 of class 'NSNumber' is retained by copy with other zone
> This one is mine, but I'm not certain that the behaviour it is expecting is 
> correct.  Shouldn't copyWithZone: in a different zone always result in a real 
> copy?  Not doing this makes zones somewhat useless.

I think zones *are* somewhat useless...

There are a *lot* of cases where OSX Foundation does not honor them.

They are unused when garbage collecting is enabled anyway.

Also, I strongly suspect that modern computer cache designs mean that the 
supposed benefit of zones (being able to allocate a group of objects close 
together in physical memory) has mostly been a fiction for many years now.

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