Re: [Help-smalltalk] Bench with OrderedCollection

[Paolo Bonzini]

Very nice analysis! But it shows the problems with microbenchmarks
more than anything else, I'd say. :-) looking forward to your debug
info improvements though!

2011/6/17, Gwenael Casaccio <address@hidden>:
> Hi,
>
> I've made a small benchmark with Coq-Stack (no jit) and GNU Smalltalk.
>
> {OrderedCollection } collect: [ :class |
>    | queue |
>    queue := class new.
>    class -> (
>    (1 to: 5) collect: [ :run |
>    ObjectMemory globalGarbageCollect.
>    {
>     (Time millisecondsToRun: [ 1 to: 1000000 do: [ :each |
>          queue addFirst: each ] ]).
>     (Time millisecondsToRun: [ 1 to: 1000000 do: [ :each |
>          queue removeFirst ] ]) } ]) ].
>
> I use a tweaked VM (no more LINE_NUMBER byte code and few other changes)
> but the results are interesting:
>
> Cog-Stack:
> {OrderedCollection->#(#(178 264) #(116 262) #(116 260) #(114 262) #(116
> 260))}
>
> Gst:
> (OrderedCollection->((371 797 ) (323 658 ) (315 661 ) (317 660 ) (316
> 658 ) ) )
>
> Now if I look at OrderedCollection>>#removeFirst at Squeak or Gst:
>
> We see that GST decrease the size instead of Squeak so if we remove
> the line:
>
> self size < self shrinkSize ifTrue: [self shrink].
>
> Gst without decreasing:
> (OrderedCollection->((383 195 ) (284 196 ) (173 196 ) (172 196 ) (173
> 196 ) )
>
> And I guess #addFirst: can be tuned  too :)
>
> Cheers,
> Gwen
>
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>

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