Weak collection changes

> If contains the following changes:
>
> WeakSet:
> - new grow strategy implemented via #growSize (it can actually shrink if
>   too many elements are garbageCollected)
> - semantic change: #slowSize doesn't change (decrease) the value of tally
>   so it doesn't supress growing
> - #fixCollisionsFrom: recycles free slots
>
> WeakKeyDictionary:
> - new finalization strategy: push model instead of pull (via finalizer)
> - new instance variable named finalizer. If it's value is not nil, then it
>   will be evaluated with the finalized associations' value
> - #fixCollisionsFrom: finalizes values and recycles free slots, instead of
>   rehashing (this boosts performance)
> - new method: #slowSize which counts only those associations which have a
>   not nil key
> - new grow stategy (same as WeakSet's)
> - #finalizeValues: is deprecated
> - #noCheckNoGrowFillFrom: (used by #grow and #rehash) finalizes values via
>   finalizer if it's not nil
> - cosmetic changes
>
> WeakRegistry:
> - new instance variable named objectsToFinalize, it's value is nil or
>   an OrderedCollection which collects the executors of garbage collected
>   objects. Access to objectsToFinalize always protected.
> - new finalization strategy uses the finalizing capability of
>   WeakKeyDictionary. WeakRegistry adds a finalizer block to its
>   WeakKeyDictionary which adds the received object to objectsToFinalize
> - #finalizeValues, #remove:ifAbsent: simplified
> - #finalizeValues has O(size) runtime worst case
> - cosmetic changes
>
> +a postscript for installing the finalizer blocks
>
> Passes all tests in WeakRegistryTest.
>
>
> It can be loaded to clean Trunk images (tested in 8972), but it has to
> be splitted (or tweaked) if we decide to add these to the trunk. Also
> further minor changes are on the way.
>
>
> Cheers,
> Levente
>
>

>
> Cheers,
>  - Andreas
>
>> If contains the following changes:
>>
>> WeakSet:
>> - new grow strategy implemented via #growSize (it can actually shrink if
>>   too many elements are garbageCollected)
>> - semantic change: #slowSize doesn't change (decrease) the value of tally
>>   so it doesn't supress growing
>> - #fixCollisionsFrom: recycles free slots
>>
>> WeakKeyDictionary:
>> - new finalization strategy: push model instead of pull (via finalizer)
>> - new instance variable named finalizer. If it's value is not nil, then it
>>   will be evaluated with the finalized associations' value
>> - #fixCollisionsFrom: finalizes values and recycles free slots, instead of
>>   rehashing (this boosts performance)
>> - new method: #slowSize which counts only those associations which have a
>>   not nil key
>> - new grow stategy (same as WeakSet's)
>> - #finalizeValues: is deprecated
>> - #noCheckNoGrowFillFrom: (used by #grow and #rehash) finalizes values via
>>   finalizer if it's not nil
>> - cosmetic changes
>>
>> WeakRegistry:
>> - new instance variable named objectsToFinalize, it's value is nil or
>>   an OrderedCollection which collects the executors of garbage collected
>>   objects. Access to objectsToFinalize always protected.
>> - new finalization strategy uses the finalizing capability of
>>   WeakKeyDictionary. WeakRegistry adds a finalizer block to its
>>   WeakKeyDictionary which adds the received object to objectsToFinalize
>> - #finalizeValues, #remove:ifAbsent: simplified
>> - #finalizeValues has O(size) runtime worst case
>> - cosmetic changes
>>
>> +a postscript for installing the finalizer blocks
>>
>> Passes all tests in WeakRegistryTest.
>>
>>
>> It can be loaded to clean Trunk images (tested in 8972), but it has to be
>> splitted (or tweaked) if we decide to add these to the trunk. Also further
>> minor changes are on the way.
>>
>>
>> Cheers,
>> Levente
>>
>>
>
>
>