How I wasted one our of my time :-)
Stefan Matthias Aust
sma at 3plus4.de
Thu Jun 15 21:46:14 UTC 2000
At 00:13 16.06.00 +0300, Daniel Vainsencher wrote:
>Anyway, food for thought:
>On my system,
>#(Set IdentitySet Dictionary IdentityDictionary) collect: [:e | c _
>(Smalltalk at: e). {c allInstances size. (c allInstances select: [:i | i
>size > colSize]) size}]
You might want to consider #count: instead of #select: and
#size. #instanceCount is also better than #allInstances and #size ;-)
I btw go different numbers, much less Sets, in my current working image. I
also checked MethodDictionary instances (last column).
>100 #(#(32 1) #(2026 0) #(1142 6) #(2453 1) #(2550 31))
>10 #(#(20 5) #(2026 0) #(1142 130) #(2453 118) #(2550 672))
>5 #(#(23 6) #(2026 0) #(1142 300) #(2453 247) #(2549 1018))
What I don't understand is why does the number of MD instances change
during the tests. And why is
Smalltalk allClasses size * 2 --> 2530
that is, what's the
>I wonder at what size hashing becomes faster than a linear search...
This probably depends on both the speed of #= and #hash. I'd guess (from
earlier experiments with VisualWorks) that the break even is around 10-20.
bye
--
Stefan Matthias Aust // Bevor wir fallen, fallen wir lieber auf
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