From: Joel VanderWerf <vjoel@...>
Date: 2006-10-29T05:25:55+09:00
Subject: Re: How to understand why object is not collected?

Victor "Zverok" Shepelev wrote:
> From: Joel VanderWerf [mailto:vjoel@path.berkeley.edu]
> Sent: Saturday, October 28, 2006 10:52 PM
>> This is probably a situation where GC is being conservative. A simple
>> example:
>>
>> class Foo; end
>>
>> foo = Foo.new
>> foo = nil
>>
>> GC.start
>>
>> p ObjectSpace.each_object(Foo) {}  # ==> 1
> 
> OK, I've got it.
> 
>> In my experience, it's hard to write precise unit tests for GC behavior,
>> and you end up with some fuzziness. The important property of GC is
>> really the asymptotic behavior.
> 
> Just for now, I need no precise unit test. I just want to know, would the
> objects of MyClass collected in principle. Can I achieve the goal somehow?

What about creating a lot of them in a loop, without keeping references? 
Then I would expect GC to leave at most one instance.

-- 
       vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407