On Tue, Apr 27, 2010 at 1:17 PM, Adrian Lienhard <adi@netstyle.ch> wrote:
BTW, Lukas had pointed out that my implementation is incomplete. So before integrating we should make sure the implementation covers all cases.
Adrian
Begin forwarded message:
From: "Lukas Renggli" <renggli@gmail.com> Date: October 21, 2008 6:28:32 PM GMT+02:00 To: "Pharo Development" <pharo-project@lists.gforge.inria.fr> Subject: Re: [Pharo-project] Size of objects Reply-To: Pharo Development <pharo-project@lists.gforge.inria.fr>
BTW, I think that would be a meaningful addition. Could somebody quickly check the method to verify that I didn't do any miscalculation?
The only problem I see is that variable objects might also have inst-vars. So you need to count the
self class instSize * Smalltalk wordSize
I am not sure if I understood. Then the method should be something like this: sizeInMemory "Returns the number of bytes used by this object in memory (including its header)" | headerSize instanceSize | headerSize := (self class indexIfCompact > 0 ifTrue: [ 4 ] ifFalse: [ 8 ]). instanceSize := self class instSize * Smalltalk wordSize. instanceSize := instanceSize + (self class isVariable ifTrue: [ (self basicSize * (self class isBytes ifTrue: [ 1 ] ifFalse: [ Smalltalk wordSize ])) ]). ^ headerSize + instanceSize ? Thanks Mariano
part in any case.
Lukas
On Apr 27, 2010, at 12:45 , Adrian Lienhard wrote:
I once sent some code to the mailing list (search for thread named "Size of objects"). We should add this to the image. I think I named it #sizeInMemory.
Adrian
On Apr 27, 2010, at 12:03 , Mariano Martinez Peck wrote:
Hi. I don't know if "memory occupation" is the better name. I just want to know the amount of memory that an object is occupying in RAM. I mean, the amount of bytes.
Is this possible ? if true, how ? I would like to do it from both sides: image and VM.
I checked both but I didn't find anything.
Thanks in advance
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