Well, this is not enough. This #sizeInMemory only tells you the size of the
object, which is simply the number of variables * 4 + size of the header.
For collection, such as OrderedCollection and Dictionary, it is worth asking
#size and #capacity:
- #size tells you the amount of objects kept in the collection
- #capacity tells you the maximum size the collection can hold without
triggering a grow operation.
For example:
Dictionary new sizeInMemory => 16
d := Dictionary new.
d at: #foo put: 1.
d sizeInMemory
=> 16
d := Dictionary new.
d at: #foo put: 1.
d capacity
=> 5
d := Dictionary new.
1 to: 1000 do: [ :i | d at: i put: i ].
d capacity
=> 2213
d := Dictionary new.
1 to: 1000 do: [ :i | d at: i put: i ].
d size
=> 1000
Alexandre
> On Oct 23, 2015, at 9:06 AM, Norbert Hartl wrote:
>
>
>> Am 23.10.2015 um 13:29 schrieb Werner Kassens :
>>
>> sorry, wrong thread, that was unintentional. werner
>>
>> On 10/23/2015 01:24 PM, Werner Kassens wrote:
>>> Hi,
>>> i'd like to test how much memory a dictionary uses. i guess i could
>>> simply delete that dictionary and see how much memory the garbage
>>> collector releases, but i wonder how i could measure that without
>>> destroying that dictionary?
>>> werner
>
> Try
>
> Dictionary new sizeInMemory
>
> Norbert
>
>
>
--
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Alexandre Bergel http://www.bergel.eu
^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.
