[Newbies] Why Squeak is so sloooow?

[Brad Fuller]

Yoshiki Ohshima wrote:
> Antonio,
>
> If you evaluate the following (and print-it):
>
> | a b |
> a := FloatArray new: (16 * 1024*1024).
> b := FloatArray new: (16 * 1024*1024).
> [a += b] timeToRun.
>
> you probably get a number around 100 or 200. This means that Squeak
> can add two 32-bit float arrays with 16M entries in 100 milliseconds
> or such. This is basicaly comparable Java-performance.
Ouch! I just did this (twice, just to make sure) in the 7058 imagine and
squeak bombed with the output below.
This was with the latest Linux 3.9 VM. I tried with the 3.7-7 VM and it
bombed too.
kernel: 2.6.16-1.2080.16.rrt.rhfc5.ccrma (realtime kernel from Stanford
- for audio)

what's the problem?

(Note Andreas said to Avi in a Sep12 msg regarding similar error:
"I think you're seeing the old problem of signed vs. unsigned ints when
accessing memory locations (the negative numbers seem to indicate that
much). Try a later VM (3.9-7 is the latest according to SqueakVM.org) -
IIRC, then this problem got fixed in later versions. )

Just to show I'm using the 3.9 version:

[bfuller at ives images]$ which squeak
/usr/local/bin/squeak

[bfuller at ives images]$ ls -lsa /usr/local/bin/squeak
0 lrwxrwxrwx 1 bfuller sonaural 26 Sep 14 16:56 /usr/local/bin/squeak ->
  ../lib/squeak/3.9-7/squeak

[bfuller at ives images]$ ls /usr/local/lib/squeak/3.9-7
AioPlugin             Squeak3D             vm-display-X11
B3DAcceleratorPlugin  UnixOSProcessPlugin  vm-sound-null
npsqueak.so           UUIDPlugin           vm-sound-OSS
PseudoTTYPlugin       vm-display-fbdev     XDisplayControlPlugin
squeak                vm-display-null


------------------------------------------------------
sweep failed to find exact end of memory

-2128024296 Point>+
-2128024388 Rectangle>center
-2128026592 Morph>layoutInBounds:
-2128027312 Morph>layoutProportionallyIn:
-2128046872 [] in ProportionalLayout>layout:in:
-2128046964 SequenceableCollection>do:
-2128047056 Morph>submorphsDo:
-2128047148 ProportionalLayout>layout:in:
-2128054100 Morph>doLayoutIn:
-2128055204 [] in Morph>fullBounds
-2128055020 BlockContext>on:do:
-2128055388 Morph>fullBounds
-2128055296 [] in Morph>submorphBounds
-2128055480 SequenceableCollection>do:
-2128055572 Morph>submorphBounds
-2128057332 Morph>privateFullBounds
-2128065988 Morph>doLayoutIn:
-2128067000 [] in Morph>fullBounds
-2128066816 BlockContext>on:do:
-2128067092 Morph>fullBounds
-2128067184 MorphicEventDispatcher>dispatchDefault:with:
-2128067276 MorphicEventDispatcher>dispatchEvent:with:
-2128067384 Morph>processEvent:using:
-2128067812 PasteUpMorph>processEvent:using:
-2128067960 Morph>processEvent:
-2128068052 HandMorph>sendEvent:focus:clear:
-2128068296 HandMorph>sendMouseEvent:
-2128068388 HandMorph>handleEvent:
-2128068768 MouseOverHandler>processMouseOver:
2032428416 HandMorph>handleEvent:
2032428116 HandMorph>processEvents
2032428208 [] in WorldState>doOneCycleNowFor:
2032428024 SequenceableCollection>do:
2032427932 WorldState>handsDo:
2032427840 WorldState>doOneCycleNowFor:
2032427748 WorldState>doOneCycleFor:
2032427656 WorldState>doOneSubCycleFor:
2032427564 PasteUpMorph>doOneSubCycle
2032409876 MenuMorph>invokeModalAt:in:allowKeyboard:
2032409784 MenuMorph>invokeModal:
2032409416 MenuMorph>invokeModal
2032402804 PluggableTextMorph>yellowButtonActivity:
2032402712 TextMorphForEditView>mouseDown:
2032402620 Morph>handleMouseDown:
2032402528 MouseButtonEvent>sentTo:
2032402436 Morph>handleEvent:
2032402332 MorphicEventDispatcher>dispatchMouseDown:with:
2032402200 MorphicEventDispatcher>dispatchEvent:with:
2032402108 Morph>processEvent:using:
2032401976 MorphicEventDispatcher>dispatchMouseDown:with:
2032401844 MorphicEventDispatcher>dispatchEvent:with:
2032401752 Morph>processEvent:using:
2032401660 MorphicEventDispatcher>dispatchMouseDown:with:
2032401568 MorphicEventDispatcher>dispatchEvent:with:
2032401476 Morph>processEvent:using:
2032401344 MorphicEventDispatcher>dispatchMouseDown:with:
2032401252 MorphicEventDispatcher>dispatchEvent:with:
2032401160 Morph>processEvent:using:
2032401068 MorphicEventDispatcher>dispatchMouseDown:with:
2032400976 MorphicEventDispatcher>dispatchEvent:with:
2032400868 Morph>processEvent:using:
2032400776 PasteUpMorph>processEvent:using:
2032400592 Morph>processEvent:
2032400500 HandMorph>sendEvent:focus:clear:
2032400408 HandMorph>sendMouseEvent:
2032400264 HandMorph>handleEvent:
2032400044 HandMorph>processEvents
2032400136 [] in WorldState>doOneCycleNowFor:
2032399952 SequenceableCollection>do:
2032399860 WorldState>handsDo:
2032399768 WorldState>doOneCycleNowFor:
2032399676 WorldState>doOneCycleFor:
2032399584 PasteUpMorph>doOneCycle
2025718576 [] in >spawnNewProcess
2025718760 [] in BlockContext>newProcess