[Pharo-project] Iso-Collections ....
Hi! Frank sais: "Traditionally Smalltalk has one Object-Memory which is garbage-collected. This introduces overhead and complicates things in multihreading programs. LSWVST introduces multiple Object-Spaces, in which garbage collection can be controlled by the programmer. Every thread has its own Standard-Object-Memory avoiding synchronisation problems. Traditionally in Smalltalk every object is boxed. An object is a pointer which has a reference to the class. This is necessary to dynamically lookup the method during resolving a message-send. This makes programs which operate on huge data-collections of the same type rather inefficient. LSWVST introduces a new object-type - IsoCollections. Iso-Collections stores type information of its elements only once." Hmmm, opening a simple Array of 1.000.000 elements consumes 4 megabytes in Pharo ... regards, Guido Stepken
Hi guido This is good to have people with kicking ass arguments. Thanks for that. Now pay attention that you do not fall only in this category because after a while this will get the inverse effect to what you want to achieve. Because I imagine that you want us to be much better and we will try hard.
Hi!
Frank sais:
"Traditionally Smalltalk has one Object-Memory which is garbage-collected. This introduces overhead and complicates things in multihreading programs. LSWVST introduces multiple Object-Spaces, in which garbage collection can be controlled by the programmer. Every thread has its own Standard-Object-Memory avoiding synchronisation problems.
This is a nice idea. We got somebody here working on similar ideas.
Traditionally in Smalltalk every object is boxed. An object is a pointer which has a reference to the class. This is necessary to dynamically lookup the method during resolving a message-send. This makes programs which operate on huge data-collections of the same type rather inefficient.
I have problem with this statement since on VW with a jit I imagine that lot of the lookup gets cached already.
LSWVST introduces a new object-type - IsoCollections. Iso-Collections stores type information of its elements only once."
Can I get LSWVST running on my machine a mac? Now I imgaine that if I could I should not look at the code for license reasons. I like the idea of DNG because I was sad to see Dolphin disappear. Now it does not work on my machine since now more than 10 years.
Hmmm, opening a simple Array of 1.000.000 elements consumes 4 megabytes in Pharo ...
I have a question: why don't you use LSWVST? I would have used Dolphin long time ago if I could have. Now we will build something open and free for the community. And communities are important else Smalltalk would be just a nice idea in the museum. Stef
regards, Guido Stepken
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stepken -
Stéphane Ducasse