On 13 March 2010 13:24, Stephan Eggermont <[email protected]> wrote:
> Igor wrote:
>>If such kind of collections didn't existed over more than
>>30 years of smalltalk existance, what makes you think
>>that there a big interest in having them today?
> Memory. Without the memory to use them, the need was
> not there.
>>Of course, they could occupy some niche, but i doubt
>>that they will replace an existing classes in a day-to-day use.
> In a 64 bit system, it is not a niche. You simply need a set of
> collection classes that work well with millions an tens of millions
> of elements, not just 100.000s.
What you talking about is an edge case in currently existing systems.
And its easy to prove:
(OrderedCollection allInstances collect: [:each | each size ]) asBag
sortedCounts
{2956->0 . 1054->1 . 570->4 . 457->5 . 387->6 . 288->2 . 247->3 .
222->7 . 162->8 . 145->9 . 83->10 . 66->11 . 41->12 . 27->14 . 18->13
. 14->15 . 11->16 . 8->30 . 6->17 . 6->25 . 5->36 . 4->21 . 4->27 .
4->42 . 3->26 . 2->18 . 2->23 . 2->24 . 2->35 . 2->44 . 2->52 . 2->222
. 2->336 . 2->1352 . 1->20 . 1->22 . 1->32 . 1->33 . 1->34 . 1->38 .
1->43 . 1->48 . 1->53 . 1->69 . 1->73 . 1->74 . 1->89 . 1->90 . 1->100
. 1->120 . 1->121 . 1->129 . 1->131 . 1->133 . 1->137 . 1->158 .
1->167 . 1->177 . 1->190 . 1->197 . 1->198 . 1->206 . 1->219 . 1->231
. 1->232 . 1->278 . 1->293 . 1->312 . 1->317 . 1->354 . 1->359 .
1->372 . 1->394 . 1->412 . 1->482 . 1->565 . 1->605 . 1->640 . 1->670
. 1->680 . 1->694 . 1->751 . 1->872}
and until this list will show a 5% or more presence of collections
which having 100000 and more elements,
i don't see a pressing need in doing something, because obviously, a
current implementation which works fine for general cases.
Or do you think that on 64 bit systems the above distribution will be different?
>>Besides, many projects implementing own kinds of collections,
>>specific to their needs.
> That is exactly what you want to avoid. I've had to implement
> these collections too often.
>
So, what stopping you from creating a separate package, say
CollectionsXL
and add there a generalized versions of collections which optimized
for working with extremely large datasets?
> Stephan
>
>
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--
Best regards,
Igor Stasenko AKA sig.
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